FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/aacdec_template.c
Date: 2022-07-07 01:21:54
Exec Total Coverage
Lines: 1485 1892 78.5%
Branches: 940 1316 71.4%

Line Branch Exec Source
1 /*
2 * AAC decoder
3 * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
4 * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
5 * Copyright (c) 2008-2013 Alex Converse <alex.converse@gmail.com>
6 *
7 * AAC LATM decoder
8 * Copyright (c) 2008-2010 Paul Kendall <paul@kcbbs.gen.nz>
9 * Copyright (c) 2010 Janne Grunau <janne-libav@jannau.net>
10 *
11 * AAC decoder fixed-point implementation
12 * Copyright (c) 2013
13 * MIPS Technologies, Inc., California.
14 *
15 * This file is part of FFmpeg.
16 *
17 * FFmpeg is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU Lesser General Public
19 * License as published by the Free Software Foundation; either
20 * version 2.1 of the License, or (at your option) any later version.
21 *
22 * FFmpeg is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25 * Lesser General Public License for more details.
26 *
27 * You should have received a copy of the GNU Lesser General Public
28 * License along with FFmpeg; if not, write to the Free Software
29 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 */
31
32 /**
33 * @file
34 * AAC decoder
35 * @author Oded Shimon ( ods15 ods15 dyndns org )
36 * @author Maxim Gavrilov ( maxim.gavrilov gmail com )
37 *
38 * AAC decoder fixed-point implementation
39 * @author Stanislav Ocovaj ( stanislav.ocovaj imgtec com )
40 * @author Nedeljko Babic ( nedeljko.babic imgtec com )
41 */
42
43 /*
44 * supported tools
45 *
46 * Support? Name
47 * N (code in SoC repo) gain control
48 * Y block switching
49 * Y window shapes - standard
50 * N window shapes - Low Delay
51 * Y filterbank - standard
52 * N (code in SoC repo) filterbank - Scalable Sample Rate
53 * Y Temporal Noise Shaping
54 * Y Long Term Prediction
55 * Y intensity stereo
56 * Y channel coupling
57 * Y frequency domain prediction
58 * Y Perceptual Noise Substitution
59 * Y Mid/Side stereo
60 * N Scalable Inverse AAC Quantization
61 * N Frequency Selective Switch
62 * N upsampling filter
63 * Y quantization & coding - AAC
64 * N quantization & coding - TwinVQ
65 * N quantization & coding - BSAC
66 * N AAC Error Resilience tools
67 * N Error Resilience payload syntax
68 * N Error Protection tool
69 * N CELP
70 * N Silence Compression
71 * N HVXC
72 * N HVXC 4kbits/s VR
73 * N Structured Audio tools
74 * N Structured Audio Sample Bank Format
75 * N MIDI
76 * N Harmonic and Individual Lines plus Noise
77 * N Text-To-Speech Interface
78 * Y Spectral Band Replication
79 * Y (not in this code) Layer-1
80 * Y (not in this code) Layer-2
81 * Y (not in this code) Layer-3
82 * N SinuSoidal Coding (Transient, Sinusoid, Noise)
83 * Y Parametric Stereo
84 * N Direct Stream Transfer
85 * Y (not in fixed point code) Enhanced AAC Low Delay (ER AAC ELD)
86 *
87 * Note: - HE AAC v1 comprises LC AAC with Spectral Band Replication.
88 * - HE AAC v2 comprises LC AAC with Spectral Band Replication and
89 Parametric Stereo.
90 */
91
92 #include "libavutil/channel_layout.h"
93 #include "libavutil/thread.h"
94 #include "internal.h"
95
96 static VLC vlc_scalefactors;
97 static VLC vlc_spectral[11];
98
99 static int output_configure(AACContext *ac,
100 uint8_t layout_map[MAX_ELEM_ID*4][3], int tags,
101 enum OCStatus oc_type, int get_new_frame);
102
103 #define overread_err "Input buffer exhausted before END element found\n"
104
105 541 static int count_channels(uint8_t (*layout)[3], int tags)
106 {
107 541 int i, sum = 0;
108
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1644 for (i = 0; i < tags; i++) {
109 1103 int syn_ele = layout[i][0];
110 1103 int pos = layout[i][2];
111
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2206 sum += (1 + (syn_ele == TYPE_CPE)) *
112
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1103 (pos != AAC_CHANNEL_OFF && pos != AAC_CHANNEL_CC);
113 }
114 541 return sum;
115 }
116
117 /**
118 * Check for the channel element in the current channel position configuration.
119 * If it exists, make sure the appropriate element is allocated and map the
120 * channel order to match the internal FFmpeg channel layout.
121 *
122 * @param che_pos current channel position configuration
123 * @param type channel element type
124 * @param id channel element id
125 * @param channels count of the number of channels in the configuration
126 *
127 * @return Returns error status. 0 - OK, !0 - error
128 */
129 4595 static av_cold int che_configure(AACContext *ac,
130 enum ChannelPosition che_pos,
131 int type, int id, int *channels)
132 {
133
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4595 if (*channels >= MAX_CHANNELS)
134 return AVERROR_INVALIDDATA;
135
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4595 if (che_pos) {
136
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4595 if (!ac->che[type][id]) {
137
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360 if (!(ac->che[type][id] = av_mallocz(sizeof(ChannelElement))))
138 return AVERROR(ENOMEM);
139 360 AAC_RENAME(ff_aac_sbr_ctx_init)(ac, &ac->che[type][id]->sbr, type);
140 }
141
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4595 if (type != TYPE_CCE) {
142
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4587 if (*channels >= MAX_CHANNELS - (type == TYPE_CPE || (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1))) {
143 av_log(ac->avctx, AV_LOG_ERROR, "Too many channels\n");
144 return AVERROR_INVALIDDATA;
145 }
146 4587 ac->output_element[(*channels)++] = &ac->che[type][id]->ch[0];
147
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4587 if (type == TYPE_CPE ||
148
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775 (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1)) {
149 4111 ac->output_element[(*channels)++] = &ac->che[type][id]->ch[1];
150 }
151 }
152 } else {
153 if (ac->che[type][id])
154 AAC_RENAME(ff_aac_sbr_ctx_close)(&ac->che[type][id]->sbr);
155 av_freep(&ac->che[type][id]);
156 }
157 4595 return 0;
158 }
159
160 50016 static int frame_configure_elements(AVCodecContext *avctx)
161 {
162 50016 AACContext *ac = avctx->priv_data;
163 int type, id, ch, ret;
164
165 /* set channel pointers to internal buffers by default */
166
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250080 for (type = 0; type < 4; type++) {
167
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3401088 for (id = 0; id < MAX_ELEM_ID; id++) {
168 3201024 ChannelElement *che = ac->che[type][id];
169
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3201024 if (che) {
170 63396 che->ch[0].ret = che->ch[0].ret_buf;
171 63396 che->ch[1].ret = che->ch[1].ret_buf;
172 }
173 }
174 }
175
176 /* get output buffer */
177 50016 av_frame_unref(ac->frame);
178
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50016 if (!avctx->ch_layout.nb_channels)
179 return 1;
180
181 50016 ac->frame->nb_samples = 2048;
182
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50016 if ((ret = ff_get_buffer(avctx, ac->frame, 0)) < 0)
183 return ret;
184
185 /* map output channel pointers to AVFrame data */
186
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144589 for (ch = 0; ch < avctx->ch_layout.nb_channels; ch++) {
187
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94573 if (ac->output_element[ch])
188 94573 ac->output_element[ch]->ret = (INTFLOAT *)ac->frame->extended_data[ch];
189 }
190
191 50016 return 0;
192 }
193
194 struct elem_to_channel {
195 uint64_t av_position;
196 uint8_t syn_ele;
197 uint8_t elem_id;
198 uint8_t aac_position;
199 };
200
201 3749 static int assign_pair(struct elem_to_channel e2c_vec[MAX_ELEM_ID],
202 uint8_t (*layout_map)[3], int offset, uint64_t left,
203 uint64_t right, int pos, uint64_t *layout)
204 {
205
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3749 if (layout_map[offset][0] == TYPE_CPE) {
206 3745 e2c_vec[offset] = (struct elem_to_channel) {
207 3745 .av_position = left | right,
208 .syn_ele = TYPE_CPE,
209 3745 .elem_id = layout_map[offset][1],
210 .aac_position = pos
211 };
212
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3745 if (e2c_vec[offset].av_position != UINT64_MAX)
213 3745 *layout |= e2c_vec[offset].av_position;
214
215 3745 return 1;
216 } else {
217 4 e2c_vec[offset] = (struct elem_to_channel) {
218 .av_position = left,
219 .syn_ele = TYPE_SCE,
220 4 .elem_id = layout_map[offset][1],
221 .aac_position = pos
222 };
223 4 e2c_vec[offset + 1] = (struct elem_to_channel) {
224 .av_position = right,
225 .syn_ele = TYPE_SCE,
226 4 .elem_id = layout_map[offset + 1][1],
227 .aac_position = pos
228 };
229
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4 if (left != UINT64_MAX)
230 4 *layout |= left;
231
232
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4 if (right != UINT64_MAX)
233 4 *layout |= right;
234
235 4 return 2;
236 }
237 }
238
239 13134 static int count_paired_channels(uint8_t (*layout_map)[3], int tags, int pos,
240 int *current)
241 {
242 13134 int num_pos_channels = 0;
243 13134 int first_cpe = 0;
244 13134 int sce_parity = 0;
245 int i;
246
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17654 for (i = *current; i < tags; i++) {
247
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4721 if (layout_map[i][2] != pos)
248 201 break;
249
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4520 if (layout_map[i][0] == TYPE_CPE) {
250
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3745 if (sce_parity) {
251
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71 if (pos == AAC_CHANNEL_FRONT && !first_cpe) {
252 71 sce_parity = 0;
253 } else {
254 return -1;
255 }
256 }
257 3745 num_pos_channels += 2;
258 3745 first_cpe = 1;
259 } else {
260 775 num_pos_channels++;
261 775 sce_parity ^= 1;
262 }
263 }
264
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13134 if (sce_parity &&
265
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696 ((pos == AAC_CHANNEL_FRONT && first_cpe) || pos == AAC_CHANNEL_SIDE))
266 return -1;
267 13134 *current = i;
268 13134 return num_pos_channels;
269 }
270
271 #define PREFIX_FOR_22POINT2 (AV_CH_LAYOUT_7POINT1_WIDE_BACK|AV_CH_BACK_CENTER|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT|AV_CH_LOW_FREQUENCY_2)
272 4378 static uint64_t sniff_channel_order(uint8_t (*layout_map)[3], int tags)
273 {
274 int i, n, total_non_cc_elements;
275 4378 struct elem_to_channel e2c_vec[4 * MAX_ELEM_ID] = { { 0 } };
276 int num_front_channels, num_side_channels, num_back_channels;
277 4378 uint64_t layout = 0;
278
279
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4378 if (FF_ARRAY_ELEMS(e2c_vec) < tags)
280 return 0;
281
282 4378 i = 0;
283 num_front_channels =
284 4378 count_paired_channels(layout_map, tags, AAC_CHANNEL_FRONT, &i);
285
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4378 if (num_front_channels < 0)
286 return 0;
287 num_side_channels =
288 4378 count_paired_channels(layout_map, tags, AAC_CHANNEL_SIDE, &i);
289
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4378 if (num_side_channels < 0)
290 return 0;
291 num_back_channels =
292 4378 count_paired_channels(layout_map, tags, AAC_CHANNEL_BACK, &i);
293
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4378 if (num_back_channels < 0)
294 return 0;
295
296
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4378 if (num_side_channels == 0 && num_back_channels >= 4) {
297 num_side_channels = 2;
298 num_back_channels -= 2;
299 }
300
301 4378 i = 0;
302
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4378 if (num_front_channels & 1) {
303 767 e2c_vec[i] = (struct elem_to_channel) {
304 .av_position = AV_CH_FRONT_CENTER,
305 .syn_ele = TYPE_SCE,
306 767 .elem_id = layout_map[i][1],
307 .aac_position = AAC_CHANNEL_FRONT
308 };
309 767 layout |= e2c_vec[i].av_position;
310 767 i++;
311 767 num_front_channels--;
312 }
313
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4378 if (num_front_channels >= 4) {
314 8 i += assign_pair(e2c_vec, layout_map, i,
315 AV_CH_FRONT_LEFT_OF_CENTER,
316 AV_CH_FRONT_RIGHT_OF_CENTER,
317 AAC_CHANNEL_FRONT, &layout);
318 8 num_front_channels -= 2;
319 }
320
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4378 if (num_front_channels >= 2) {
321 3682 i += assign_pair(e2c_vec, layout_map, i,
322 AV_CH_FRONT_LEFT,
323 AV_CH_FRONT_RIGHT,
324 AAC_CHANNEL_FRONT, &layout);
325 3682 num_front_channels -= 2;
326 }
327
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4378 while (num_front_channels >= 2) {
328 i += assign_pair(e2c_vec, layout_map, i,
329 UINT64_MAX,
330 UINT64_MAX,
331 AAC_CHANNEL_FRONT, &layout);
332 num_front_channels -= 2;
333 }
334
335
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4378 if (num_side_channels >= 2) {
336 i += assign_pair(e2c_vec, layout_map, i,
337 AV_CH_SIDE_LEFT,
338 AV_CH_SIDE_RIGHT,
339 AAC_CHANNEL_FRONT, &layout);
340 num_side_channels -= 2;
341 }
342
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4378 while (num_side_channels >= 2) {
343 i += assign_pair(e2c_vec, layout_map, i,
344 UINT64_MAX,
345 UINT64_MAX,
346 AAC_CHANNEL_SIDE, &layout);
347 num_side_channels -= 2;
348 }
349
350
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4378 while (num_back_channels >= 4) {
351 i += assign_pair(e2c_vec, layout_map, i,
352 UINT64_MAX,
353 UINT64_MAX,
354 AAC_CHANNEL_BACK, &layout);
355 num_back_channels -= 2;
356 }
357
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4378 if (num_back_channels >= 2) {
358 59 i += assign_pair(e2c_vec, layout_map, i,
359 AV_CH_BACK_LEFT,
360 AV_CH_BACK_RIGHT,
361 AAC_CHANNEL_BACK, &layout);
362 59 num_back_channels -= 2;
363 }
364
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4378 if (num_back_channels) {
365 e2c_vec[i] = (struct elem_to_channel) {
366 .av_position = AV_CH_BACK_CENTER,
367 .syn_ele = TYPE_SCE,
368 .elem_id = layout_map[i][1],
369 .aac_position = AAC_CHANNEL_BACK
370 };
371 layout |= e2c_vec[i].av_position;
372 i++;
373 num_back_channels--;
374 }
375
376
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4378 if (i < tags && layout_map[i][2] == AAC_CHANNEL_LFE) {
377 67 e2c_vec[i] = (struct elem_to_channel) {
378 .av_position = AV_CH_LOW_FREQUENCY,
379 .syn_ele = TYPE_LFE,
380 67 .elem_id = layout_map[i][1],
381 .aac_position = AAC_CHANNEL_LFE
382 };
383 67 layout |= e2c_vec[i].av_position;
384 67 i++;
385 }
386
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4378 if (i < tags && layout_map[i][2] == AAC_CHANNEL_LFE) {
387 e2c_vec[i] = (struct elem_to_channel) {
388 .av_position = AV_CH_LOW_FREQUENCY_2,
389 .syn_ele = TYPE_LFE,
390 .elem_id = layout_map[i][1],
391 .aac_position = AAC_CHANNEL_LFE
392 };
393 layout |= e2c_vec[i].av_position;
394 i++;
395 }
396
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4378 while (i < tags && layout_map[i][2] == AAC_CHANNEL_LFE) {
397 e2c_vec[i] = (struct elem_to_channel) {
398 .av_position = UINT64_MAX,
399 .syn_ele = TYPE_LFE,
400 .elem_id = layout_map[i][1],
401 .aac_position = AAC_CHANNEL_LFE
402 };
403 i++;
404 }
405
406 // The previous checks would end up at 8 at this point for 22.2
407
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4378 if (layout == PREFIX_FOR_22POINT2 && tags == 16 && i == 8) {
408 const uint8_t (*reference_layout_map)[3] = aac_channel_layout_map[12];
409 for (int j = 0; j < tags; j++) {
410 if (layout_map[j][0] != reference_layout_map[j][0] ||
411 layout_map[j][2] != reference_layout_map[j][2])
412 goto end_of_layout_definition;
413 }
414
415 e2c_vec[i] = (struct elem_to_channel) {
416 .av_position = AV_CH_TOP_FRONT_CENTER,
417 .syn_ele = layout_map[i][0],
418 .elem_id = layout_map[i][1],
419 .aac_position = layout_map[i][2]
420 }; layout |= e2c_vec[i].av_position; i++;
421 i += assign_pair(e2c_vec, layout_map, i,
422 AV_CH_TOP_FRONT_LEFT,
423 AV_CH_TOP_FRONT_RIGHT,
424 AAC_CHANNEL_FRONT,
425 &layout);
426 i += assign_pair(e2c_vec, layout_map, i,
427 AV_CH_TOP_SIDE_LEFT,
428 AV_CH_TOP_SIDE_RIGHT,
429 AAC_CHANNEL_SIDE,
430 &layout);
431 e2c_vec[i] = (struct elem_to_channel) {
432 .av_position = AV_CH_TOP_CENTER,
433 .syn_ele = layout_map[i][0],
434 .elem_id = layout_map[i][1],
435 .aac_position = layout_map[i][2]
436 }; layout |= e2c_vec[i].av_position; i++;
437 i += assign_pair(e2c_vec, layout_map, i,
438 AV_CH_TOP_BACK_LEFT,
439 AV_CH_TOP_BACK_RIGHT,
440 AAC_CHANNEL_BACK,
441 &layout);
442 e2c_vec[i] = (struct elem_to_channel) {
443 .av_position = AV_CH_TOP_BACK_CENTER,
444 .syn_ele = layout_map[i][0],
445 .elem_id = layout_map[i][1],
446 .aac_position = layout_map[i][2]
447 }; layout |= e2c_vec[i].av_position; i++;
448 e2c_vec[i] = (struct elem_to_channel) {
449 .av_position = AV_CH_BOTTOM_FRONT_CENTER,
450 .syn_ele = layout_map[i][0],
451 .elem_id = layout_map[i][1],
452 .aac_position = layout_map[i][2]
453 }; layout |= e2c_vec[i].av_position; i++;
454 i += assign_pair(e2c_vec, layout_map, i,
455 AV_CH_BOTTOM_FRONT_LEFT,
456 AV_CH_BOTTOM_FRONT_RIGHT,
457 AAC_CHANNEL_FRONT,
458 &layout);
459 }
460
461 4378 end_of_layout_definition:
462
463 4378 total_non_cc_elements = n = i;
464
465
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4378 if (layout == AV_CH_LAYOUT_22POINT2) {
466 // For 22.2 reorder the result as needed
467 FFSWAP(struct elem_to_channel, e2c_vec[2], e2c_vec[0]); // FL & FR first (final), FC third
468 FFSWAP(struct elem_to_channel, e2c_vec[2], e2c_vec[1]); // FC second (final), FLc & FRc third
469 FFSWAP(struct elem_to_channel, e2c_vec[6], e2c_vec[2]); // LFE1 third (final), FLc & FRc seventh
470 FFSWAP(struct elem_to_channel, e2c_vec[4], e2c_vec[3]); // BL & BR fourth (final), SiL & SiR fifth
471 FFSWAP(struct elem_to_channel, e2c_vec[6], e2c_vec[4]); // FLc & FRc fifth (final), SiL & SiR seventh
472 FFSWAP(struct elem_to_channel, e2c_vec[7], e2c_vec[6]); // LFE2 seventh (final), SiL & SiR eight (final)
473 FFSWAP(struct elem_to_channel, e2c_vec[9], e2c_vec[8]); // TpFL & TpFR ninth (final), TFC tenth (final)
474 FFSWAP(struct elem_to_channel, e2c_vec[11], e2c_vec[10]); // TC eleventh (final), TpSiL & TpSiR twelth
475 FFSWAP(struct elem_to_channel, e2c_vec[12], e2c_vec[11]); // TpBL & TpBR twelth (final), TpSiL & TpSiR thirteenth (final)
476 } else {
477 // For everything else, utilize the AV channel position define as a
478 // stable sort.
479 do {
480 4457 int next_n = 0;
481
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4800 for (i = 1; i < n; i++)
482
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343 if (e2c_vec[i - 1].av_position > e2c_vec[i].av_position) {
483 146 FFSWAP(struct elem_to_channel, e2c_vec[i - 1], e2c_vec[i]);
484 146 next_n = i;
485 }
486 4457 n = next_n;
487
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4457 } while (n > 0);
488
489 }
490
491
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8965 for (i = 0; i < total_non_cc_elements; i++) {
492 4587 layout_map[i][0] = e2c_vec[i].syn_ele;
493 4587 layout_map[i][1] = e2c_vec[i].elem_id;
494 4587 layout_map[i][2] = e2c_vec[i].aac_position;
495 }
496
497 4378 return layout;
498 }
499
500 /**
501 * Save current output configuration if and only if it has been locked.
502 */
503 4118 static int push_output_configuration(AACContext *ac) {
504 4118 int pushed = 0;
505
506
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4118 if (ac->oc[1].status == OC_LOCKED || ac->oc[0].status == OC_NONE) {
507 4118 ac->oc[0] = ac->oc[1];
508 4118 pushed = 1;
509 }
510 4118 ac->oc[1].status = OC_NONE;
511 4118 return pushed;
512 }
513
514 /**
515 * Restore the previous output configuration if and only if the current
516 * configuration is unlocked.
517 */
518 static void pop_output_configuration(AACContext *ac) {
519 if (ac->oc[1].status != OC_LOCKED && ac->oc[0].status != OC_NONE) {
520 ac->oc[1] = ac->oc[0];
521 ac->avctx->ch_layout = ac->oc[1].ch_layout;
522 output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
523 ac->oc[1].status, 0);
524 }
525 }
526
527 /**
528 * Configure output channel order based on the current program
529 * configuration element.
530 *
531 * @return Returns error status. 0 - OK, !0 - error
532 */
533 4378 static int output_configure(AACContext *ac,
534 uint8_t layout_map[MAX_ELEM_ID * 4][3], int tags,
535 enum OCStatus oc_type, int get_new_frame)
536 {
537 4378 AVCodecContext *avctx = ac->avctx;
538 4378 int i, channels = 0, ret;
539 4378 uint64_t layout = 0;
540 4378 uint8_t id_map[TYPE_END][MAX_ELEM_ID] = {{ 0 }};
541 4378 uint8_t type_counts[TYPE_END] = { 0 };
542
543
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4378 if (ac->oc[1].layout_map != layout_map) {
544 4366 memcpy(ac->oc[1].layout_map, layout_map, tags * sizeof(layout_map[0]));
545 4366 ac->oc[1].layout_map_tags = tags;
546 }
547
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8973 for (i = 0; i < tags; i++) {
548 4595 int type = layout_map[i][0];
549 4595 int id = layout_map[i][1];
550 4595 id_map[type][id] = type_counts[type]++;
551
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4595 if (id_map[type][id] >= MAX_ELEM_ID) {
552 avpriv_request_sample(ac->avctx, "Too large remapped id");
553 return AVERROR_PATCHWELCOME;
554 }
555 }
556 // Try to sniff a reasonable channel order, otherwise output the
557 // channels in the order the PCE declared them.
558 #if FF_API_OLD_CHANNEL_LAYOUT
559 FF_DISABLE_DEPRECATION_WARNINGS
560
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4378 if (avctx->request_channel_layout == AV_CH_LAYOUT_NATIVE)
561 ac->output_channel_order = CHANNEL_ORDER_CODED;
562 FF_ENABLE_DEPRECATION_WARNINGS
563 #endif
564
565
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4378 if (ac->output_channel_order == CHANNEL_ORDER_DEFAULT)
566 4378 layout = sniff_channel_order(layout_map, tags);
567
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8973 for (i = 0; i < tags; i++) {
568 4595 int type = layout_map[i][0];
569 4595 int id = layout_map[i][1];
570 4595 int iid = id_map[type][id];
571 4595 int position = layout_map[i][2];
572 // Allocate or free elements depending on if they are in the
573 // current program configuration.
574 4595 ret = che_configure(ac, position, type, iid, &channels);
575
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4595 if (ret < 0)
576 return ret;
577 4595 ac->tag_che_map[type][id] = ac->che[type][iid];
578 }
579
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4378 if (ac->oc[1].m4ac.ps == 1 && channels == 2) {
580
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366 if (layout == AV_CH_FRONT_CENTER) {
581 366 layout = AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT;
582 } else {
583 layout = 0;
584 }
585 }
586
587 4378 av_channel_layout_uninit(&ac->oc[1].ch_layout);
588
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4378 if (layout)
589 4378 av_channel_layout_from_mask(&ac->oc[1].ch_layout, layout);
590 else {
591 ac->oc[1].ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
592 ac->oc[1].ch_layout.nb_channels = channels;
593 }
594
595 4378 av_channel_layout_copy(&avctx->ch_layout, &ac->oc[1].ch_layout);
596 4378 ac->oc[1].status = oc_type;
597
598
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4378 if (get_new_frame) {
599
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12 if ((ret = frame_configure_elements(ac->avctx)) < 0)
600 return ret;
601 }
602
603 4378 return 0;
604 }
605
606 5 static void flush(AVCodecContext *avctx)
607 {
608 5 AACContext *ac= avctx->priv_data;
609 int type, i, j;
610
611
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25 for (type = 3; type >= 0; type--) {
612
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340 for (i = 0; i < MAX_ELEM_ID; i++) {
613 320 ChannelElement *che = ac->che[type][i];
614
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320 if (che) {
615
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15 for (j = 0; j <= 1; j++) {
616 10 memset(che->ch[j].saved, 0, sizeof(che->ch[j].saved));
617 }
618 }
619 }
620 }
621 5 }
622
623 /**
624 * Set up channel positions based on a default channel configuration
625 * as specified in table 1.17.
626 *
627 * @return Returns error status. 0 - OK, !0 - error
628 */
629 4644 static int set_default_channel_config(AACContext *ac, AVCodecContext *avctx,
630 uint8_t (*layout_map)[3],
631 int *tags,
632 int channel_config)
633 {
634
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4644 if (channel_config < 1 || (channel_config > 7 && channel_config < 11) ||
635 channel_config > 13) {
636 av_log(avctx, AV_LOG_ERROR,
637 "invalid default channel configuration (%d)\n",
638 channel_config);
639 return AVERROR_INVALIDDATA;
640 }
641 4644 *tags = tags_per_config[channel_config];
642 4644 memcpy(layout_map, aac_channel_layout_map[channel_config - 1],
643 4644 *tags * sizeof(*layout_map));
644
645 /*
646 * AAC specification has 7.1(wide) as a default layout for 8-channel streams.
647 * However, at least Nero AAC encoder encodes 7.1 streams using the default
648 * channel config 7, mapping the side channels of the original audio stream
649 * to the second AAC_CHANNEL_FRONT pair in the AAC stream. Similarly, e.g. FAAD
650 * decodes the second AAC_CHANNEL_FRONT pair as side channels, therefore decoding
651 * the incorrect streams as if they were correct (and as the encoder intended).
652 *
653 * As actual intended 7.1(wide) streams are very rare, default to assuming a
654 * 7.1 layout was intended.
655 */
656
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4644 if (channel_config == 7 && avctx->strict_std_compliance < FF_COMPLIANCE_STRICT) {
657 layout_map[2][2] = AAC_CHANNEL_SIDE;
658
659 if (!ac || !ac->warned_71_wide++) {
660 av_log(avctx, AV_LOG_INFO, "Assuming an incorrectly encoded 7.1 channel layout"
661 " instead of a spec-compliant 7.1(wide) layout, use -strict %d to decode"
662 " according to the specification instead.\n", FF_COMPLIANCE_STRICT);
663 }
664 }
665
666 4644 return 0;
667 }
668
669 63050 static ChannelElement *get_che(AACContext *ac, int type, int elem_id)
670 {
671 /* For PCE based channel configurations map the channels solely based
672 * on tags. */
673
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63050 if (!ac->oc[1].m4ac.chan_config) {
674 24124 return ac->tag_che_map[type][elem_id];
675 }
676 // Allow single CPE stereo files to be signalled with mono configuration.
677
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38926 if (!ac->tags_mapped && type == TYPE_CPE &&
678
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20540 ac->oc[1].m4ac.chan_config == 1) {
679 uint8_t layout_map[MAX_ELEM_ID*4][3];
680 int layout_map_tags;
681 push_output_configuration(ac);
682
683 av_log(ac->avctx, AV_LOG_DEBUG, "mono with CPE\n");
684
685 if (set_default_channel_config(ac, ac->avctx, layout_map,
686 &layout_map_tags, 2) < 0)
687 return NULL;
688 if (output_configure(ac, layout_map, layout_map_tags,
689 OC_TRIAL_FRAME, 1) < 0)
690 return NULL;
691
692 ac->oc[1].m4ac.chan_config = 2;
693 ac->oc[1].m4ac.ps = 0;
694 }
695 // And vice-versa
696
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38926 if (!ac->tags_mapped && type == TYPE_SCE &&
697
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15926 ac->oc[1].m4ac.chan_config == 2) {
698 uint8_t layout_map[MAX_ELEM_ID * 4][3];
699 int layout_map_tags;
700 push_output_configuration(ac);
701
702 av_log(ac->avctx, AV_LOG_DEBUG, "stereo with SCE\n");
703
704 if (set_default_channel_config(ac, ac->avctx, layout_map,
705 &layout_map_tags, 1) < 0)
706 return NULL;
707 if (output_configure(ac, layout_map, layout_map_tags,
708 OC_TRIAL_FRAME, 1) < 0)
709 return NULL;
710
711 ac->oc[1].m4ac.chan_config = 1;
712 if (ac->oc[1].m4ac.sbr)
713 ac->oc[1].m4ac.ps = -1;
714 }
715 /* For indexed channel configurations map the channels solely based
716 * on position. */
717
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38926 switch (ac->oc[1].m4ac.chan_config) {
718 case 13:
719 if (ac->tags_mapped > 3 && ((type == TYPE_CPE && elem_id < 8) ||
720 (type == TYPE_SCE && elem_id < 6) ||
721 (type == TYPE_LFE && elem_id < 2))) {
722 ac->tags_mapped++;
723 return ac->tag_che_map[type][elem_id] = ac->che[type][elem_id];
724 }
725 case 12:
726 case 7:
727 if (ac->tags_mapped == 3 && type == TYPE_CPE) {
728 ac->tags_mapped++;
729 return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][2];
730 }
731 case 11:
732 if (ac->tags_mapped == 2 &&
733 ac->oc[1].m4ac.chan_config == 11 &&
734 type == TYPE_SCE) {
735 ac->tags_mapped++;
736 return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
737 }
738 case 6:
739 /* Some streams incorrectly code 5.1 audio as
740 * SCE[0] CPE[0] CPE[1] SCE[1]
741 * instead of
742 * SCE[0] CPE[0] CPE[1] LFE[0].
743 * If we seem to have encountered such a stream, transfer
744 * the LFE[0] element to the SCE[1]'s mapping */
745
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3280 if (ac->tags_mapped == tags_per_config[ac->oc[1].m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) {
746
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820 if (!ac->warned_remapping_once && (type != TYPE_LFE || elem_id != 0)) {
747 av_log(ac->avctx, AV_LOG_WARNING,
748 "This stream seems to incorrectly report its last channel as %s[%d], mapping to LFE[0]\n",
749 type == TYPE_SCE ? "SCE" : "LFE", elem_id);
750 ac->warned_remapping_once++;
751 }
752 820 ac->tags_mapped++;
753 820 return ac->tag_che_map[type][elem_id] = ac->che[TYPE_LFE][0];
754 }
755 case 5:
756
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2460 if (ac->tags_mapped == 2 && type == TYPE_CPE) {
757 820 ac->tags_mapped++;
758 820 return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][1];
759 }
760 case 4:
761 /* Some streams incorrectly code 4.0 audio as
762 * SCE[0] CPE[0] LFE[0]
763 * instead of
764 * SCE[0] CPE[0] SCE[1].
765 * If we seem to have encountered such a stream, transfer
766 * the SCE[1] element to the LFE[0]'s mapping */
767
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1640 if (ac->tags_mapped == tags_per_config[ac->oc[1].m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) {
768 if (!ac->warned_remapping_once && (type != TYPE_SCE || elem_id != 1)) {
769 av_log(ac->avctx, AV_LOG_WARNING,
770 "This stream seems to incorrectly report its last channel as %s[%d], mapping to SCE[1]\n",
771 type == TYPE_SCE ? "SCE" : "LFE", elem_id);
772 ac->warned_remapping_once++;
773 }
774 ac->tags_mapped++;
775 return ac->tag_che_map[type][elem_id] = ac->che[TYPE_SCE][1];
776 }
777
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1640 if (ac->tags_mapped == 2 &&
778 ac->oc[1].m4ac.chan_config == 4 &&
779 type == TYPE_SCE) {
780 ac->tags_mapped++;
781 return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
782 }
783 case 3:
784 case 2:
785
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22180 if (ac->tags_mapped == (ac->oc[1].m4ac.chan_config != 2) &&
786 type == TYPE_CPE) {
787 21360 ac->tags_mapped++;
788 21360 return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][0];
789
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820 } else if (ac->oc[1].m4ac.chan_config == 2) {
790 return NULL;
791 }
792 case 1:
793
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15926 if (!ac->tags_mapped && type == TYPE_SCE) {
794 15926 ac->tags_mapped++;
795 15926 return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][0];
796 }
797 default:
798 return NULL;
799 }
800 }
801
802 /**
803 * Decode an array of 4 bit element IDs, optionally interleaved with a
804 * stereo/mono switching bit.
805 *
806 * @param type speaker type/position for these channels
807 */
808 215 static void decode_channel_map(uint8_t layout_map[][3],
809 enum ChannelPosition type,
810 GetBitContext *gb, int n)
811 {
812
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310 while (n--) {
813 enum RawDataBlockType syn_ele;
814
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95 switch (type) {
815 75 case AAC_CHANNEL_FRONT:
816 case AAC_CHANNEL_BACK:
817 case AAC_CHANNEL_SIDE:
818 75 syn_ele = get_bits1(gb);
819 75 break;
820 8 case AAC_CHANNEL_CC:
821 8 skip_bits1(gb);
822 8 syn_ele = TYPE_CCE;
823 8 break;
824 12 case AAC_CHANNEL_LFE:
825 12 syn_ele = TYPE_LFE;
826 12 break;
827 default:
828 // AAC_CHANNEL_OFF has no channel map
829 av_assert0(0);
830 }
831 95 layout_map[0][0] = syn_ele;
832 95 layout_map[0][1] = get_bits(gb, 4);
833 95 layout_map[0][2] = type;
834 95 layout_map++;
835 }
836 215 }
837
838 43 static inline void relative_align_get_bits(GetBitContext *gb,
839 int reference_position) {
840 43 int n = (reference_position - get_bits_count(gb) & 7);
841
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43 if (n)
842 39 skip_bits(gb, n);
843 43 }
844
845 /**
846 * Decode program configuration element; reference: table 4.2.
847 *
848 * @return Returns error status. 0 - OK, !0 - error
849 */
850 43 static int decode_pce(AVCodecContext *avctx, MPEG4AudioConfig *m4ac,
851 uint8_t (*layout_map)[3],
852 GetBitContext *gb, int byte_align_ref)
853 {
854 int num_front, num_side, num_back, num_lfe, num_assoc_data, num_cc;
855 int sampling_index;
856 int comment_len;
857 int tags;
858
859 43 skip_bits(gb, 2); // object_type
860
861 43 sampling_index = get_bits(gb, 4);
862
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43 if (m4ac->sampling_index != sampling_index)
863 av_log(avctx, AV_LOG_WARNING,
864 "Sample rate index in program config element does not "
865 "match the sample rate index configured by the container.\n");
866
867 43 num_front = get_bits(gb, 4);
868 43 num_side = get_bits(gb, 4);
869 43 num_back = get_bits(gb, 4);
870 43 num_lfe = get_bits(gb, 2);
871 43 num_assoc_data = get_bits(gb, 3);
872 43 num_cc = get_bits(gb, 4);
873
874
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43 if (get_bits1(gb))
875 skip_bits(gb, 4); // mono_mixdown_tag
876
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43 if (get_bits1(gb))
877 skip_bits(gb, 4); // stereo_mixdown_tag
878
879
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43 if (get_bits1(gb))
880 skip_bits(gb, 3); // mixdown_coeff_index and pseudo_surround
881
882
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43 if (get_bits_left(gb) < 5 * (num_front + num_side + num_back + num_cc) + 4 *(num_lfe + num_assoc_data + num_cc)) {
883 av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
884 return -1;
885 }
886 43 decode_channel_map(layout_map , AAC_CHANNEL_FRONT, gb, num_front);
887 43 tags = num_front;
888 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_SIDE, gb, num_side);
889 43 tags += num_side;
890 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_BACK, gb, num_back);
891 43 tags += num_back;
892 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_LFE, gb, num_lfe);
893 43 tags += num_lfe;
894
895 43 skip_bits_long(gb, 4 * num_assoc_data);
896
897 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_CC, gb, num_cc);
898 43 tags += num_cc;
899
900 43 relative_align_get_bits(gb, byte_align_ref);
901
902 /* comment field, first byte is length */
903 43 comment_len = get_bits(gb, 8) * 8;
904
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43 if (get_bits_left(gb) < comment_len) {
905 av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
906 return AVERROR_INVALIDDATA;
907 }
908 43 skip_bits_long(gb, comment_len);
909 43 return tags;
910 }
911
912 /**
913 * Decode GA "General Audio" specific configuration; reference: table 4.1.
914 *
915 * @param ac pointer to AACContext, may be null
916 * @param avctx pointer to AVCCodecContext, used for logging
917 *
918 * @return Returns error status. 0 - OK, !0 - error
919 */
920 541 static int decode_ga_specific_config(AACContext *ac, AVCodecContext *avctx,
921 GetBitContext *gb,
922 int get_bit_alignment,
923 MPEG4AudioConfig *m4ac,
924 int channel_config)
925 {
926 int extension_flag, ret, ep_config, res_flags;
927 uint8_t layout_map[MAX_ELEM_ID*4][3];
928 541 int tags = 0;
929
930 #if USE_FIXED
931
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19 if (get_bits1(gb)) { // frameLengthFlag
932 avpriv_report_missing_feature(avctx, "Fixed point 960/120 MDCT window");
933 return AVERROR_PATCHWELCOME;
934 }
935 19 m4ac->frame_length_short = 0;
936 #else
937 522 m4ac->frame_length_short = get_bits1(gb);
938
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522 if (m4ac->frame_length_short && m4ac->sbr == 1) {
939 avpriv_report_missing_feature(avctx, "SBR with 960 frame length");
940 if (ac) ac->warned_960_sbr = 1;
941 m4ac->sbr = 0;
942 m4ac->ps = 0;
943 }
944 #endif
945
946
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541 if (get_bits1(gb)) // dependsOnCoreCoder
947 skip_bits(gb, 14); // coreCoderDelay
948 541 extension_flag = get_bits1(gb);
949
950
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541 if (m4ac->object_type == AOT_AAC_SCALABLE ||
951
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541 m4ac->object_type == AOT_ER_AAC_SCALABLE)
952 skip_bits(gb, 3); // layerNr
953
954
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541 if (channel_config == 0) {
955 43 skip_bits(gb, 4); // element_instance_tag
956 43 tags = decode_pce(avctx, m4ac, layout_map, gb, get_bit_alignment);
957
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43 if (tags < 0)
958 return tags;
959 } else {
960
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498 if ((ret = set_default_channel_config(ac, avctx, layout_map,
961 &tags, channel_config)))
962 return ret;
963 }
964
965
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541 if (count_channels(layout_map, tags) > 1) {
966 449 m4ac->ps = 0;
967
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92 } else if (m4ac->sbr == 1 && m4ac->ps == -1)
968 18 m4ac->ps = 1;
969
970
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541 if (ac && (ret = output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
971 return ret;
972
973
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541 if (extension_flag) {
974
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4 switch (m4ac->object_type) {
975 case AOT_ER_BSAC:
976 skip_bits(gb, 5); // numOfSubFrame
977 skip_bits(gb, 11); // layer_length
978 break;
979 4 case AOT_ER_AAC_LC:
980 case AOT_ER_AAC_LTP:
981 case AOT_ER_AAC_SCALABLE:
982 case AOT_ER_AAC_LD:
983 4 res_flags = get_bits(gb, 3);
984
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4 if (res_flags) {
985 avpriv_report_missing_feature(avctx,
986 "AAC data resilience (flags %x)",
987 res_flags);
988 return AVERROR_PATCHWELCOME;
989 }
990 4 break;
991 }
992 4 skip_bits1(gb); // extensionFlag3 (TBD in version 3)
993 }
994
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541 switch (m4ac->object_type) {
995 4 case AOT_ER_AAC_LC:
996 case AOT_ER_AAC_LTP:
997 case AOT_ER_AAC_SCALABLE:
998 case AOT_ER_AAC_LD:
999 4 ep_config = get_bits(gb, 2);
1000
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4 if (ep_config) {
1001 avpriv_report_missing_feature(avctx,
1002 "epConfig %d", ep_config);
1003 return AVERROR_PATCHWELCOME;
1004 }
1005 }
1006 541 return 0;
1007 }
1008
1009 10 static int decode_eld_specific_config(AACContext *ac, AVCodecContext *avctx,
1010 GetBitContext *gb,
1011 MPEG4AudioConfig *m4ac,
1012 int channel_config)
1013 {
1014 int ret, ep_config, res_flags;
1015 uint8_t layout_map[MAX_ELEM_ID*4][3];
1016 10 int tags = 0;
1017 10 const int ELDEXT_TERM = 0;
1018
1019 10 m4ac->ps = 0;
1020 10 m4ac->sbr = 0;
1021 #if USE_FIXED
1022
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2 if (get_bits1(gb)) { // frameLengthFlag
1023 avpriv_request_sample(avctx, "960/120 MDCT window");
1024 return AVERROR_PATCHWELCOME;
1025 }
1026 #else
1027 8 m4ac->frame_length_short = get_bits1(gb);
1028 #endif
1029 10 res_flags = get_bits(gb, 3);
1030
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10 if (res_flags) {
1031 avpriv_report_missing_feature(avctx,
1032 "AAC data resilience (flags %x)",
1033 res_flags);
1034 return AVERROR_PATCHWELCOME;
1035 }
1036
1037
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10 if (get_bits1(gb)) { // ldSbrPresentFlag
1038 avpriv_report_missing_feature(avctx,
1039 "Low Delay SBR");
1040 return AVERROR_PATCHWELCOME;
1041 }
1042
1043
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10 while (get_bits(gb, 4) != ELDEXT_TERM) {
1044 int len = get_bits(gb, 4);
1045 if (len == 15)
1046 len += get_bits(gb, 8);
1047 if (len == 15 + 255)
1048 len += get_bits(gb, 16);
1049 if (get_bits_left(gb) < len * 8 + 4) {
1050 av_log(avctx, AV_LOG_ERROR, overread_err);
1051 return AVERROR_INVALIDDATA;
1052 }
1053 skip_bits_long(gb, 8 * len);
1054 }
1055
1056
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10 if ((ret = set_default_channel_config(ac, avctx, layout_map,
1057 &tags, channel_config)))
1058 return ret;
1059
1060
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10 if (ac && (ret = output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
1061 return ret;
1062
1063 10 ep_config = get_bits(gb, 2);
1064
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10 if (ep_config) {
1065 avpriv_report_missing_feature(avctx,
1066 "epConfig %d", ep_config);
1067 return AVERROR_PATCHWELCOME;
1068 }
1069 10 return 0;
1070 }
1071
1072 /**
1073 * Decode audio specific configuration; reference: table 1.13.
1074 *
1075 * @param ac pointer to AACContext, may be null
1076 * @param avctx pointer to AVCCodecContext, used for logging
1077 * @param m4ac pointer to MPEG4AudioConfig, used for parsing
1078 * @param gb buffer holding an audio specific config
1079 * @param get_bit_alignment relative alignment for byte align operations
1080 * @param sync_extension look for an appended sync extension
1081 *
1082 * @return Returns error status or number of consumed bits. <0 - error
1083 */
1084 551 static int decode_audio_specific_config_gb(AACContext *ac,
1085 AVCodecContext *avctx,
1086 MPEG4AudioConfig *m4ac,
1087 GetBitContext *gb,
1088 int get_bit_alignment,
1089 int sync_extension)
1090 {
1091 int i, ret;
1092 551 GetBitContext gbc = *gb;
1093 551 MPEG4AudioConfig m4ac_bak = *m4ac;
1094
1095
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551 if ((i = ff_mpeg4audio_get_config_gb(m4ac, &gbc, sync_extension, avctx)) < 0) {
1096 *m4ac = m4ac_bak;
1097 return AVERROR_INVALIDDATA;
1098 }
1099
1100
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551 if (m4ac->sampling_index > 12) {
1101 av_log(avctx, AV_LOG_ERROR,
1102 "invalid sampling rate index %d\n",
1103 m4ac->sampling_index);
1104 *m4ac = m4ac_bak;
1105 return AVERROR_INVALIDDATA;
1106 }
1107
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551 if (m4ac->object_type == AOT_ER_AAC_LD &&
1108
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4 (m4ac->sampling_index < 3 || m4ac->sampling_index > 7)) {
1109 av_log(avctx, AV_LOG_ERROR,
1110 "invalid low delay sampling rate index %d\n",
1111 m4ac->sampling_index);
1112 *m4ac = m4ac_bak;
1113 return AVERROR_INVALIDDATA;
1114 }
1115
1116 551 skip_bits_long(gb, i);
1117
1118
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551 switch (m4ac->object_type) {
1119 541 case AOT_AAC_MAIN:
1120 case AOT_AAC_LC:
1121 case AOT_AAC_SSR:
1122 case AOT_AAC_LTP:
1123 case AOT_ER_AAC_LC:
1124 case AOT_ER_AAC_LD:
1125
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541 if ((ret = decode_ga_specific_config(ac, avctx, gb, get_bit_alignment,
1126 m4ac, m4ac->chan_config)) < 0)
1127 return ret;
1128 541 break;
1129 10 case AOT_ER_AAC_ELD:
1130
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10 if ((ret = decode_eld_specific_config(ac, avctx, gb,
1131 m4ac, m4ac->chan_config)) < 0)
1132 return ret;
1133 10 break;
1134 default:
1135 avpriv_report_missing_feature(avctx,
1136 "Audio object type %s%d",
1137 m4ac->sbr == 1 ? "SBR+" : "",
1138 m4ac->object_type);
1139 return AVERROR(ENOSYS);
1140 }
1141
1142 ff_dlog(avctx,
1143 "AOT %d chan config %d sampling index %d (%d) SBR %d PS %d\n",
1144 m4ac->object_type, m4ac->chan_config, m4ac->sampling_index,
1145 m4ac->sample_rate, m4ac->sbr,
1146 m4ac->ps);
1147
1148 551 return get_bits_count(gb);
1149 }
1150
1151 230 static int decode_audio_specific_config(AACContext *ac,
1152 AVCodecContext *avctx,
1153 MPEG4AudioConfig *m4ac,
1154 const uint8_t *data, int64_t bit_size,
1155 int sync_extension)
1156 {
1157 int i, ret;
1158 GetBitContext gb;
1159
1160
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230 if (bit_size < 0 || bit_size > INT_MAX) {
1161 av_log(avctx, AV_LOG_ERROR, "Audio specific config size is invalid\n");
1162 return AVERROR_INVALIDDATA;
1163 }
1164
1165 ff_dlog(avctx, "audio specific config size %d\n", (int)bit_size >> 3);
1166
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1595 for (i = 0; i < bit_size >> 3; i++)
1167 ff_dlog(avctx, "%02x ", data[i]);
1168 ff_dlog(avctx, "\n");
1169
1170
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230 if ((ret = init_get_bits(&gb, data, bit_size)) < 0)
1171 return ret;
1172
1173 230 return decode_audio_specific_config_gb(ac, avctx, m4ac, &gb, 0,
1174 sync_extension);
1175 }
1176
1177 /**
1178 * linear congruential pseudorandom number generator
1179 *
1180 * @param previous_val pointer to the current state of the generator
1181 *
1182 * @return Returns a 32-bit pseudorandom integer
1183 */
1184 5944200 static av_always_inline int lcg_random(unsigned previous_val)
1185 {
1186 5944200 union { unsigned u; int s; } v = { previous_val * 1664525u + 1013904223 };
1187 5944200 return v.s;
1188 }
1189
1190 40 static void reset_all_predictors(PredictorState *ps)
1191 {
1192 int i;
1193
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26920 for (i = 0; i < MAX_PREDICTORS; i++)
1194 26880 reset_predict_state(&ps[i]);
1195 40 }
1196
1197 59 static int sample_rate_idx (int rate)
1198 {
1199
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59 if (92017 <= rate) return 0;
1200
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59 else if (75132 <= rate) return 1;
1201
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59 else if (55426 <= rate) return 2;
1202
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59 else if (46009 <= rate) return 3;
1203
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58 else if (37566 <= rate) return 4;
1204
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42 else if (27713 <= rate) return 5;
1205
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39 else if (23004 <= rate) return 6;
1206
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39 else if (18783 <= rate) return 7;
1207
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39 else if (13856 <= rate) return 8;
1208
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35 else if (11502 <= rate) return 9;
1209
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35 else if (9391 <= rate) return 10;
1210 35 else return 11;
1211 }
1212
1213 518 static void reset_predictor_group(PredictorState *ps, int group_num)
1214 {
1215 int i;
1216
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12180 for (i = group_num - 1; i < MAX_PREDICTORS; i += 30)
1217 11662 reset_predict_state(&ps[i]);
1218 518 }
1219
1220 static void aacdec_init(AACContext *ac);
1221
1222 172 static av_cold void aac_static_table_init(void)
1223 {
1224 static VLCElem vlc_buf[304 + 270 + 550 + 300 + 328 +
1225 294 + 306 + 268 + 510 + 366 + 462];
1226
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2064 for (unsigned i = 0, offset = 0; i < 11; i++) {
1227 1892 vlc_spectral[i].table = &vlc_buf[offset];
1228 1892 vlc_spectral[i].table_allocated = FF_ARRAY_ELEMS(vlc_buf) - offset;
1229 1892 ff_init_vlc_sparse(&vlc_spectral[i], 8, ff_aac_spectral_sizes[i],
1230 1892 ff_aac_spectral_bits[i], sizeof(ff_aac_spectral_bits[i][0]),
1231 sizeof(ff_aac_spectral_bits[i][0]),
1232 1892 ff_aac_spectral_codes[i], sizeof(ff_aac_spectral_codes[i][0]),
1233 sizeof(ff_aac_spectral_codes[i][0]),
1234 1892 ff_aac_codebook_vector_idx[i], sizeof(ff_aac_codebook_vector_idx[i][0]),
1235 sizeof(ff_aac_codebook_vector_idx[i][0]),
1236 INIT_VLC_STATIC_OVERLONG);
1237 1892 offset += vlc_spectral[i].table_size;
1238 }
1239
1240 172 AAC_RENAME(ff_aac_sbr_init)();
1241
1242 172 ff_aac_tableinit();
1243
1244 172 INIT_VLC_STATIC(&vlc_scalefactors, 7,
1245 FF_ARRAY_ELEMS(ff_aac_scalefactor_code),
1246 ff_aac_scalefactor_bits,
1247 sizeof(ff_aac_scalefactor_bits[0]),
1248 sizeof(ff_aac_scalefactor_bits[0]),
1249 ff_aac_scalefactor_code,
1250 sizeof(ff_aac_scalefactor_code[0]),
1251 sizeof(ff_aac_scalefactor_code[0]),
1252 352);
1253
1254 // window initialization
1255 #if !USE_FIXED
1256 155 AAC_RENAME(ff_kbd_window_init)(AAC_RENAME(aac_kbd_long_960), 4.0, 960);
1257 155 AAC_RENAME(ff_kbd_window_init)(AAC_RENAME(aac_kbd_short_120), 6.0, 120);
1258 155 AAC_RENAME(ff_sine_window_init)(AAC_RENAME(sine_960), 960);
1259 155 AAC_RENAME(ff_sine_window_init)(AAC_RENAME(sine_120), 120);
1260 155 AAC_RENAME(ff_init_ff_sine_windows)(9);
1261 155 ff_aac_float_common_init();
1262 #else
1263 17 AAC_RENAME(ff_kbd_window_init)(AAC_RENAME2(aac_kbd_long_1024), 4.0, 1024);
1264 17 AAC_RENAME(ff_kbd_window_init)(AAC_RENAME2(aac_kbd_short_128), 6.0, 128);
1265 17 init_sine_windows_fixed();
1266 #endif
1267
1268 172 AAC_RENAME(ff_cbrt_tableinit)();
1269 172 }
1270
1271 static AVOnce aac_table_init = AV_ONCE_INIT;
1272
1273 282 static av_cold int aac_decode_init(AVCodecContext *avctx)
1274 {
1275 282 AACContext *ac = avctx->priv_data;
1276 int ret;
1277
1278
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282 if (avctx->sample_rate > 96000)
1279 return AVERROR_INVALIDDATA;
1280
1281 282 ret = ff_thread_once(&aac_table_init, &aac_static_table_init);
1282
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282 if (ret != 0)
1283 return AVERROR_UNKNOWN;
1284
1285 282 ac->avctx = avctx;
1286 282 ac->oc[1].m4ac.sample_rate = avctx->sample_rate;
1287
1288 282 aacdec_init(ac);
1289 #if USE_FIXED
1290 21 avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
1291 #else
1292 261 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1293 #endif /* USE_FIXED */
1294
1295
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282 if (avctx->extradata_size > 0) {
1296
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223 if ((ret = decode_audio_specific_config(ac, ac->avctx, &ac->oc[1].m4ac,
1297 223 avctx->extradata,
1298 223 avctx->extradata_size * 8LL,
1299 1)) < 0)
1300 return ret;
1301 } else {
1302 int sr, i;
1303 uint8_t layout_map[MAX_ELEM_ID*4][3];
1304 int layout_map_tags;
1305
1306 59 sr = sample_rate_idx(avctx->sample_rate);
1307 59 ac->oc[1].m4ac.sampling_index = sr;
1308 59 ac->oc[1].m4ac.channels = avctx->ch_layout.nb_channels;
1309 59 ac->oc[1].m4ac.sbr = -1;
1310 59 ac->oc[1].m4ac.ps = -1;
1311
1312
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107 for (i = 0; i < FF_ARRAY_ELEMS(ff_mpeg4audio_channels); i++)
1313
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107 if (ff_mpeg4audio_channels[i] == avctx->ch_layout.nb_channels)
1314 59 break;
1315
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59 if (i == FF_ARRAY_ELEMS(ff_mpeg4audio_channels)) {
1316 i = 0;
1317 }
1318 59 ac->oc[1].m4ac.chan_config = i;
1319
1320
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59 if (ac->oc[1].m4ac.chan_config) {
1321 24 int ret = set_default_channel_config(ac, avctx, layout_map,
1322 &layout_map_tags, ac->oc[1].m4ac.chan_config);
1323
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24 if (!ret)
1324 24 output_configure(ac, layout_map, layout_map_tags,
1325 OC_GLOBAL_HDR, 0);
1326 else if (avctx->err_recognition & AV_EF_EXPLODE)
1327 return AVERROR_INVALIDDATA;
1328 }
1329 }
1330
1331
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282 if (avctx->ch_layout.nb_channels > MAX_CHANNELS) {
1332 av_log(avctx, AV_LOG_ERROR, "Too many channels\n");
1333 return AVERROR_INVALIDDATA;
1334 }
1335
1336 #if USE_FIXED
1337 21 ac->fdsp = avpriv_alloc_fixed_dsp(avctx->flags & AV_CODEC_FLAG_BITEXACT);
1338 #else
1339 261 ac->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
1340 #endif /* USE_FIXED */
1341
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282 if (!ac->fdsp) {
1342 return AVERROR(ENOMEM);
1343 }
1344
1345 282 ac->random_state = 0x1f2e3d4c;
1346
1347 282 AAC_RENAME_32(ff_mdct_init)(&ac->mdct, 11, 1, 1.0 / RANGE15(1024.0));
1348 282 AAC_RENAME_32(ff_mdct_init)(&ac->mdct_ld, 10, 1, 1.0 / RANGE15(512.0));
1349 282 AAC_RENAME_32(ff_mdct_init)(&ac->mdct_small, 8, 1, 1.0 / RANGE15(128.0));
1350 282 AAC_RENAME_32(ff_mdct_init)(&ac->mdct_ltp, 11, 0, RANGE15(-2.0));
1351 #if !USE_FIXED
1352 261 ret = ff_mdct15_init(&ac->mdct120, 1, 3, 1.0f/(16*1024*120*2));
1353
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261 if (ret < 0)
1354 return ret;
1355 261 ret = ff_mdct15_init(&ac->mdct480, 1, 5, 1.0f/(16*1024*960));
1356
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261 if (ret < 0)
1357 return ret;
1358 261 ret = ff_mdct15_init(&ac->mdct960, 1, 6, 1.0f/(16*1024*960*2));
1359
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261 if (ret < 0)
1360 return ret;
1361 #endif
1362
1363 282 return 0;
1364 }
1365
1366 /**
1367 * Skip data_stream_element; reference: table 4.10.
1368 */
1369 2821 static int skip_data_stream_element(AACContext *ac, GetBitContext *gb)
1370 {
1371 2821 int byte_align = get_bits1(gb);
1372 2821 int count = get_bits(gb, 8);
1373
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2821 if (count == 255)
1374 count += get_bits(gb, 8);
1375
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2821 if (byte_align)
1376 2454 align_get_bits(gb);
1377
1378
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2821 if (get_bits_left(gb) < 8 * count) {
1379 av_log(ac->avctx, AV_LOG_ERROR, "skip_data_stream_element: "overread_err);
1380 return AVERROR_INVALIDDATA;
1381 }
1382 2821 skip_bits_long(gb, 8 * count);
1383 2821 return 0;
1384 }
1385
1386 1426 static int decode_prediction(AACContext *ac, IndividualChannelStream *ics,
1387 GetBitContext *gb)
1388 {
1389 int sfb;
1390
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1426 if (get_bits1(gb)) {
1391 359 ics->predictor_reset_group = get_bits(gb, 5);
1392
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359 if (ics->predictor_reset_group == 0 ||
1393
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359 ics->predictor_reset_group > 30) {
1394 av_log(ac->avctx, AV_LOG_ERROR,
1395 "Invalid Predictor Reset Group.\n");
1396 return AVERROR_INVALIDDATA;
1397 }
1398 }
1399
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47801 for (sfb = 0; sfb < FFMIN(ics->max_sfb, ff_aac_pred_sfb_max[ac->oc[1].m4ac.sampling_index]); sfb++) {
1400 46375 ics->prediction_used[sfb] = get_bits1(gb);
1401 }
1402 1426 return 0;
1403 }
1404
1405 /**
1406 * Decode Long Term Prediction data; reference: table 4.xx.
1407 */
1408 786 static void decode_ltp(LongTermPrediction *ltp,
1409 GetBitContext *gb, uint8_t max_sfb)
1410 {
1411 int sfb;
1412
1413 786 ltp->lag = get_bits(gb, 11);
1414 786 ltp->coef = ltp_coef[get_bits(gb, 3)];
1415
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32226 for (sfb = 0; sfb < FFMIN(max_sfb, MAX_LTP_LONG_SFB); sfb++)
1416 31440 ltp->used[sfb] = get_bits1(gb);
1417 786 }
1418
1419 /**
1420 * Decode Individual Channel Stream info; reference: table 4.6.
1421 */
1422 63272 static int decode_ics_info(AACContext *ac, IndividualChannelStream *ics,
1423 GetBitContext *gb)
1424 {
1425 63272 const MPEG4AudioConfig *const m4ac = &ac->oc[1].m4ac;
1426 63272 const int aot = m4ac->object_type;
1427 63272 const int sampling_index = m4ac->sampling_index;
1428 63272 int ret_fail = AVERROR_INVALIDDATA;
1429
1430
2/2
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63272 if (aot != AOT_ER_AAC_ELD) {
1431
1/2
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46907 if (get_bits1(gb)) {
1432 av_log(ac->avctx, AV_LOG_ERROR, "Reserved bit set.\n");
1433 if (ac->avctx->err_recognition & AV_EF_BITSTREAM)
1434 return AVERROR_INVALIDDATA;
1435 }
1436 46907 ics->window_sequence[1] = ics->window_sequence[0];
1437 46907 ics->window_sequence[0] = get_bits(gb, 2);
1438
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46907 if (aot == AOT_ER_AAC_LD &&
1439
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2424 ics->window_sequence[0] != ONLY_LONG_SEQUENCE) {
1440 av_log(ac->avctx, AV_LOG_ERROR,
1441 "AAC LD is only defined for ONLY_LONG_SEQUENCE but "
1442 "window sequence %d found.\n", ics->window_sequence[0]);
1443 ics->window_sequence[0] = ONLY_LONG_SEQUENCE;
1444 return AVERROR_INVALIDDATA;
1445 }
1446 46907 ics->use_kb_window[1] = ics->use_kb_window[0];
1447 46907 ics->use_kb_window[0] = get_bits1(gb);
1448 }
1449 63272 ics->num_window_groups = 1;
1450 63272 ics->group_len[0] = 1;
1451
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63272 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
1452 int i;
1453 1331 ics->max_sfb = get_bits(gb, 4);
1454
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10648 for (i = 0; i < 7; i++) {
1455
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✓ Branch 2 taken 3428 times.
9317 if (get_bits1(gb)) {
1456 5889 ics->group_len[ics->num_window_groups - 1]++;
1457 } else {
1458 3428 ics->num_window_groups++;
1459 3428 ics->group_len[ics->num_window_groups - 1] = 1;
1460 }
1461 }
1462 1331 ics->num_windows = 8;
1463
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1331 if (m4ac->frame_length_short) {
1464 1 ics->swb_offset = ff_swb_offset_120[sampling_index];
1465 1 ics->num_swb = ff_aac_num_swb_120[sampling_index];
1466 } else {
1467 1330 ics->swb_offset = ff_swb_offset_128[sampling_index];
1468 1330 ics->num_swb = ff_aac_num_swb_128[sampling_index];
1469 }
1470 1331 ics->tns_max_bands = ff_tns_max_bands_128[sampling_index];
1471 1331 ics->predictor_present = 0;
1472 } else {
1473 61941 ics->max_sfb = get_bits(gb, 6);
1474 61941 ics->num_windows = 1;
1475
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61941 if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD) {
1476
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18789 if (m4ac->frame_length_short) {
1477 3559 ics->swb_offset = ff_swb_offset_480[sampling_index];
1478 3559 ics->num_swb = ff_aac_num_swb_480[sampling_index];
1479 3559 ics->tns_max_bands = ff_tns_max_bands_480[sampling_index];
1480 } else {
1481 15230 ics->swb_offset = ff_swb_offset_512[sampling_index];
1482 15230 ics->num_swb = ff_aac_num_swb_512[sampling_index];
1483 15230 ics->tns_max_bands = ff_tns_max_bands_512[sampling_index];
1484 }
1485
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18789 if (!ics->num_swb || !ics->swb_offset) {
1486 ret_fail = AVERROR_BUG;
1487 goto fail;
1488 }
1489 } else {
1490
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43152 if (m4ac->frame_length_short) {
1491 386 ics->num_swb = ff_aac_num_swb_960[sampling_index];
1492 386 ics->swb_offset = ff_swb_offset_960[sampling_index];
1493 } else {
1494 42766 ics->num_swb = ff_aac_num_swb_1024[sampling_index];
1495 42766 ics->swb_offset = ff_swb_offset_1024[sampling_index];
1496 }
1497 43152 ics->tns_max_bands = ff_tns_max_bands_1024[sampling_index];
1498 }
1499
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61941 if (aot != AOT_ER_AAC_ELD) {
1500 45576 ics->predictor_present = get_bits1(gb);
1501 45576 ics->predictor_reset_group = 0;
1502 }
1503
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61941 if (ics->predictor_present) {
1504
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✓ Branch 1 taken 538 times.
1964 if (aot == AOT_AAC_MAIN) {
1505
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1426 if (decode_prediction(ac, ics, gb)) {
1506 goto fail;
1507 }
1508
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✗ Branch 2 not taken.
✓ Branch 3 taken 538 times.
538 } else if (aot == AOT_AAC_LC ||
1509 aot == AOT_ER_AAC_LC) {
1510 av_log(ac->avctx, AV_LOG_ERROR,
1511 "Prediction is not allowed in AAC-LC.\n");
1512 goto fail;
1513 } else {
1514
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✓ Branch 1 taken 538 times.
538 if (aot == AOT_ER_AAC_LD) {
1515 av_log(ac->avctx, AV_LOG_ERROR,
1516 "LTP in ER AAC LD not yet implemented.\n");
1517 ret_fail = AVERROR_PATCHWELCOME;
1518 goto fail;
1519 }
1520
2/2
✓ Branch 1 taken 382 times.
✓ Branch 2 taken 156 times.
538 if ((ics->ltp.present = get_bits(gb, 1)))
1521 382 decode_ltp(&ics->ltp, gb, ics->max_sfb);
1522 }
1523 }
1524 }
1525
1526
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63272 if (ics->max_sfb > ics->num_swb) {
1527 av_log(ac->avctx, AV_LOG_ERROR,
1528 "Number of scalefactor bands in group (%d) "
1529 "exceeds limit (%d).\n",
1530 ics->max_sfb, ics->num_swb);
1531 goto fail;
1532 }
1533
1534 63272 return 0;
1535 fail:
1536 ics->max_sfb = 0;
1537 return ret_fail;
1538 }
1539
1540 /**
1541 * Decode band types (section_data payload); reference: table 4.46.
1542 *
1543 * @param band_type array of the used band type
1544 * @param band_type_run_end array of the last scalefactor band of a band type run
1545 *
1546 * @return Returns error status. 0 - OK, !0 - error
1547 */
1548 93736 static int decode_band_types(AACContext *ac, enum BandType band_type[120],
1549 int band_type_run_end[120], GetBitContext *gb,
1550 IndividualChannelStream *ics)
1551 {
1552 93736 int g, idx = 0;
1553
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93736 const int bits = (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) ? 3 : 5;
1554
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192710 for (g = 0; g < ics->num_window_groups; g++) {
1555 98974 int k = 0;
1556
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562671 while (k < ics->max_sfb) {
1557 463697 uint8_t sect_end = k;
1558 int sect_len_incr;
1559 463697 int sect_band_type = get_bits(gb, 4);
1560
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463697 if (sect_band_type == 12) {
1561 av_log(ac->avctx, AV_LOG_ERROR, "invalid band type\n");
1562 return AVERROR_INVALIDDATA;
1563 }
1564 do {
1565 482410 sect_len_incr = get_bits(gb, bits);
1566 482410 sect_end += sect_len_incr;
1567
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482410 if (get_bits_left(gb) < 0) {
1568 av_log(ac->avctx, AV_LOG_ERROR, "decode_band_types: "overread_err);
1569 return AVERROR_INVALIDDATA;
1570 }
1571
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482410 if (sect_end > ics->max_sfb) {
1572 av_log(ac->avctx, AV_LOG_ERROR,
1573 "Number of bands (%d) exceeds limit (%d).\n",
1574 sect_end, ics->max_sfb);
1575 return AVERROR_INVALIDDATA;
1576 }
1577
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482410 } while (sect_len_incr == (1 << bits) - 1);
1578
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3935007 for (; k < sect_end; k++) {
1579 3471310 band_type [idx] = sect_band_type;
1580 3471310 band_type_run_end[idx++] = sect_end;
1581 }
1582 }
1583 }
1584 93736 return 0;
1585 }
1586
1587 /**
1588 * Decode scalefactors; reference: table 4.47.
1589 *
1590 * @param global_gain first scalefactor value as scalefactors are differentially coded
1591 * @param band_type array of the used band type
1592 * @param band_type_run_end array of the last scalefactor band of a band type run
1593 * @param sf array of scalefactors or intensity stereo positions
1594 *
1595 * @return Returns error status. 0 - OK, !0 - error
1596 */
1597 93736 static int decode_scalefactors(AACContext *ac, INTFLOAT sf[120], GetBitContext *gb,
1598 unsigned int global_gain,
1599 IndividualChannelStream *ics,
1600 enum BandType band_type[120],
1601 int band_type_run_end[120])
1602 {
1603 93736 int g, i, idx = 0;
1604 93736 int offset[3] = { global_gain, global_gain - NOISE_OFFSET, 0 };
1605 int clipped_offset;
1606 93736 int noise_flag = 1;
1607
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192710 for (g = 0; g < ics->num_window_groups; g++) {
1608
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562671 for (i = 0; i < ics->max_sfb;) {
1609 463697 int run_end = band_type_run_end[idx];
1610
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463697 if (band_type[idx] == ZERO_BT) {
1611
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596738 for (; i < run_end; i++, idx++)
1612 533534 sf[idx] = FIXR(0.);
1613
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✓ Branch 1 taken 9472 times.
400493 } else if ((band_type[idx] == INTENSITY_BT) ||
1614
2/2
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✓ Branch 1 taken 390910 times.
391021 (band_type[idx] == INTENSITY_BT2)) {
1615
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✓ Branch 1 taken 9583 times.
75790 for (; i < run_end; i++, idx++) {
1616 66207 offset[2] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
1617 66207 clipped_offset = av_clip(offset[2], -155, 100);
1618
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66207 if (offset[2] != clipped_offset) {
1619 avpriv_request_sample(ac->avctx,
1620 "If you heard an audible artifact, there may be a bug in the decoder. "
1621 "Clipped intensity stereo position (%d -> %d)",
1622 offset[2], clipped_offset);
1623 }
1624 #if USE_FIXED
1625 17856 sf[idx] = 100 - clipped_offset;
1626 #else
1627 48351 sf[idx] = ff_aac_pow2sf_tab[-clipped_offset + POW_SF2_ZERO];
1628 #endif /* USE_FIXED */
1629 }
1630
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390910 } else if (band_type[idx] == NOISE_BT) {
1631
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289440 for (; i < run_end; i++, idx++) {
1632
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✓ Branch 1 taken 274900 times.
281615 if (noise_flag-- > 0)
1633 6715 offset[1] += get_bits(gb, NOISE_PRE_BITS) - NOISE_PRE;
1634 else
1635 274900 offset[1] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
1636 281615 clipped_offset = av_clip(offset[1], -100, 155);
1637
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✓ Branch 1 taken 281615 times.
281615 if (offset[1] != clipped_offset) {
1638 avpriv_request_sample(ac->avctx,
1639 "If you heard an audible artifact, there may be a bug in the decoder. "
1640 "Clipped noise gain (%d -> %d)",
1641 offset[1], clipped_offset);
1642 }
1643 #if USE_FIXED
1644 137931 sf[idx] = -(100 + clipped_offset);
1645 #else
1646 143684 sf[idx] = -ff_aac_pow2sf_tab[clipped_offset + POW_SF2_ZERO];
1647 #endif /* USE_FIXED */
1648 }
1649 } else {
1650
2/2
✓ Branch 0 taken 2589954 times.
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2973039 for (; i < run_end; i++, idx++) {
1651 2589954 offset[0] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
1652
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2589954 if (offset[0] > 255U) {
1653 av_log(ac->avctx, AV_LOG_ERROR,
1654 "Scalefactor (%d) out of range.\n", offset[0]);
1655 return AVERROR_INVALIDDATA;
1656 }
1657 #if USE_FIXED
1658 779531 sf[idx] = -offset[0];
1659 #else
1660 1810423 sf[idx] = -ff_aac_pow2sf_tab[offset[0] - 100 + POW_SF2_ZERO];
1661 #endif /* USE_FIXED */
1662 }
1663 }
1664 }
1665 }
1666 93736 return 0;
1667 }
1668
1669 /**
1670 * Decode pulse data; reference: table 4.7.
1671 */
1672 1098 static int decode_pulses(Pulse *pulse, GetBitContext *gb,
1673 const uint16_t *swb_offset, int num_swb)
1674 {
1675 int i, pulse_swb;
1676 1098 pulse->num_pulse = get_bits(gb, 2) + 1;
1677 1098 pulse_swb = get_bits(gb, 6);
1678
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1098 if (pulse_swb >= num_swb)
1679 return -1;
1680 1098 pulse->pos[0] = swb_offset[pulse_swb];
1681 1098 pulse->pos[0] += get_bits(gb, 5);
1682
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✓ Branch 1 taken 1098 times.
1098 if (pulse->pos[0] >= swb_offset[num_swb])
1683 return -1;
1684 1098 pulse->amp[0] = get_bits(gb, 4);
1685
2/2
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2744 for (i = 1; i < pulse->num_pulse; i++) {
1686 1646 pulse->pos[i] = get_bits(gb, 5) + pulse->pos[i - 1];
1687
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1646 if (pulse->pos[i] >= swb_offset[num_swb])
1688 return -1;
1689 1646 pulse->amp[i] = get_bits(gb, 4);
1690 }
1691 1098 return 0;
1692 }
1693
1694 /**
1695 * Decode Temporal Noise Shaping data; reference: table 4.48.
1696 *
1697 * @return Returns error status. 0 - OK, !0 - error
1698 */
1699 6927 static int decode_tns(AACContext *ac, TemporalNoiseShaping *tns,
1700 GetBitContext *gb, const IndividualChannelStream *ics)
1701 {
1702 int w, filt, i, coef_len, coef_res, coef_compress;
1703 6927 const int is8 = ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE;
1704
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6927 const int tns_max_order = is8 ? 7 : ac->oc[1].m4ac.object_type == AOT_AAC_MAIN ? 20 : 12;
1705
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18467 for (w = 0; w < ics->num_windows; w++) {
1706
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✓ Branch 2 taken 3622 times.
11540 if ((tns->n_filt[w] = get_bits(gb, 2 - is8))) {
1707 7918 coef_res = get_bits1(gb);
1708
1709
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✓ Branch 1 taken 7918 times.
17297 for (filt = 0; filt < tns->n_filt[w]; filt++) {
1710 int tmp2_idx;
1711 9379 tns->length[w][filt] = get_bits(gb, 6 - 2 * is8);
1712
1713
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9379 if ((tns->order[w][filt] = get_bits(gb, 5 - 2 * is8)) > tns_max_order) {
1714 av_log(ac->avctx, AV_LOG_ERROR,
1715 "TNS filter order %d is greater than maximum %d.\n",
1716 tns->order[w][filt], tns_max_order);
1717 tns->order[w][filt] = 0;
1718 return AVERROR_INVALIDDATA;
1719 }
1720
2/2
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9379 if (tns->order[w][filt]) {
1721 8859 tns->direction[w][filt] = get_bits1(gb);
1722 8859 coef_compress = get_bits1(gb);
1723 8859 coef_len = coef_res + 3 - coef_compress;
1724 8859 tmp2_idx = 2 * coef_compress + coef_res;
1725
1726
2/2
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67167 for (i = 0; i < tns->order[w][filt]; i++)
1727 58308 tns->coef[w][filt][i] = tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)];
1728 }
1729 }
1730 }
1731 }
1732 6927 return 0;
1733 }
1734
1735 /**
1736 * Decode Mid/Side data; reference: table 4.54.
1737 *
1738 * @param ms_present Indicates mid/side stereo presence. [0] mask is all 0s;
1739 * [1] mask is decoded from bitstream; [2] mask is all 1s;
1740 * [3] reserved for scalable AAC
1741 */
1742 26972 static void decode_mid_side_stereo(ChannelElement *cpe, GetBitContext *gb,
1743 int ms_present)
1744 {
1745 int idx;
1746 26972 int max_idx = cpe->ch[0].ics.num_window_groups * cpe->ch[0].ics.max_sfb;
1747
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26972 if (ms_present == 1) {
1748
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510465 for (idx = 0; idx < max_idx; idx++)
1749 497780 cpe->ms_mask[idx] = get_bits1(gb);
1750
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✗ Branch 1 not taken.
14287 } else if (ms_present == 2) {
1751 14287 memset(cpe->ms_mask, 1, max_idx * sizeof(cpe->ms_mask[0]));
1752 }
1753 26972 }
1754
1755 /**
1756 * Decode spectral data; reference: table 4.50.
1757 * Dequantize and scale spectral data; reference: 4.6.3.3.
1758 *
1759 * @param coef array of dequantized, scaled spectral data
1760 * @param sf array of scalefactors or intensity stereo positions
1761 * @param pulse_present set if pulses are present
1762 * @param pulse pointer to pulse data struct
1763 * @param band_type array of the used band type
1764 *
1765 * @return Returns error status. 0 - OK, !0 - error
1766 */
1767 93736 static int decode_spectrum_and_dequant(AACContext *ac, INTFLOAT coef[1024],
1768 GetBitContext *gb, const INTFLOAT sf[120],
1769 int pulse_present, const Pulse *pulse,
1770 const IndividualChannelStream *ics,
1771 enum BandType band_type[120])
1772 {
1773 93736 int i, k, g, idx = 0;
1774 93736 const int c = 1024 / ics->num_windows;
1775 93736 const uint16_t *offsets = ics->swb_offset;
1776 93736 INTFLOAT *coef_base = coef;
1777
1778
2/2
✓ Branch 0 taken 108359 times.
✓ Branch 1 taken 93736 times.
202095 for (g = 0; g < ics->num_windows; g++)
1779 108359 memset(coef + g * 128 + offsets[ics->max_sfb], 0,
1780 108359 sizeof(INTFLOAT) * (c - offsets[ics->max_sfb]));
1781
1782
2/2
✓ Branch 0 taken 98974 times.
✓ Branch 1 taken 93736 times.
192710 for (g = 0; g < ics->num_window_groups; g++) {
1783 98974 unsigned g_len = ics->group_len[g];
1784
1785
2/2
✓ Branch 0 taken 3471310 times.
✓ Branch 1 taken 98974 times.
3570284 for (i = 0; i < ics->max_sfb; i++, idx++) {
1786 3471310 const unsigned cbt_m1 = band_type[idx] - 1;
1787 3471310 INTFLOAT *cfo = coef + offsets[i];
1788 3471310 int off_len = offsets[i + 1] - offsets[i];
1789 int group;
1790
1791
2/2
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✓ Branch 1 taken 2871569 times.
3471310 if (cbt_m1 >= INTENSITY_BT2 - 1) {
1792
2/2
✓ Branch 0 taken 637814 times.
✓ Branch 1 taken 599741 times.
1237555 for (group = 0; group < (AAC_SIGNE)g_len; group++, cfo+=128) {
1793 637814 memset(cfo, 0, off_len * sizeof(*cfo));
1794 }
1795
2/2
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✓ Branch 1 taken 2589954 times.
2871569 } else if (cbt_m1 == NOISE_BT - 1) {
1796
2/2
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✓ Branch 1 taken 281615 times.
563257 for (group = 0; group < (AAC_SIGNE)g_len; group++, cfo+=128) {
1797 INTFLOAT band_energy;
1798 #if USE_FIXED
1799
2/2
✓ Branch 0 taken 2883476 times.
✓ Branch 1 taken 137931 times.
3021407 for (k = 0; k < off_len; k++) {
1800 2883476 ac->random_state = lcg_random(ac->random_state);
1801 2883476 cfo[k] = ac->random_state >> 3;
1802 }
1803
1804 137931 band_energy = ac->fdsp->scalarproduct_fixed(cfo, cfo, off_len);
1805 137931 band_energy = fixed_sqrt(band_energy, 31);
1806 137931 noise_scale(cfo, sf[idx], band_energy, off_len);
1807 #else
1808 float scale;
1809
1810
2/2
✓ Branch 0 taken 3060724 times.
✓ Branch 1 taken 143711 times.
3204435 for (k = 0; k < off_len; k++) {
1811 3060724 ac->random_state = lcg_random(ac->random_state);
1812 3060724 cfo[k] = ac->random_state;
1813 }
1814
1815 143711 band_energy = ac->fdsp->scalarproduct_float(cfo, cfo, off_len);
1816 143711 scale = sf[idx] / sqrtf(band_energy);
1817 143711 ac->fdsp->vector_fmul_scalar(cfo, cfo, scale, off_len);
1818 #endif /* USE_FIXED */
1819 }
1820 } else {
1821 #if !USE_FIXED
1822 1810423 const float *vq = ff_aac_codebook_vector_vals[cbt_m1];
1823 #endif /* !USE_FIXED */
1824 2589954 const VLCElem *vlc_tab = vlc_spectral[cbt_m1].table;
1825 2589954 OPEN_READER(re, gb);
1826
1827
5/5
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✓ Branch 1 taken 578848 times.
✓ Branch 2 taken 399520 times.
✓ Branch 3 taken 543934 times.
✓ Branch 4 taken 438826 times.
2589954 switch (cbt_m1 >> 1) {
1828 628826 case 0:
1829
2/2
✓ Branch 0 taken 656190 times.
✓ Branch 1 taken 628826 times.
1285016 for (group = 0; group < (AAC_SIGNE)g_len; group++, cfo+=128) {
1830 656190 INTFLOAT *cf = cfo;
1831 656190 int len = off_len;
1832
1833 do {
1834 int code;
1835 unsigned cb_idx;
1836
1837 3268639 UPDATE_CACHE(re, gb);
1838
2/2
✓ Branch 1 taken 111173 times.
✓ Branch 2 taken 3157466 times.
3268639 GET_VLC(code, re, gb, vlc_tab, 8, 2);
1839 3268639 cb_idx = code;
1840 #if USE_FIXED
1841 995694 cf = DEC_SQUAD(cf, cb_idx);
1842 #else
1843 2272945 cf = VMUL4(cf, vq, cb_idx, sf + idx);
1844 #endif /* USE_FIXED */
1845
2/2
✓ Branch 0 taken 2612449 times.
✓ Branch 1 taken 656190 times.
3268639 } while (len -= 4);
1846 }
1847 628826 break;
1848
1849 578848 case 1:
1850
2/2
✓ Branch 0 taken 591305 times.
✓ Branch 1 taken 578848 times.
1170153 for (group = 0; group < (AAC_SIGNE)g_len; group++, cfo+=128) {
1851 591305 INTFLOAT *cf = cfo;
1852 591305 int len = off_len;
1853
1854 do {
1855 int code;
1856 unsigned nnz;
1857 unsigned cb_idx;
1858 uint32_t bits;
1859
1860 2635089 UPDATE_CACHE(re, gb);
1861
2/2
✓ Branch 1 taken 94141 times.
✓ Branch 2 taken 2540948 times.
2635089 GET_VLC(code, re, gb, vlc_tab, 8, 2);
1862 2635089 cb_idx = code;
1863 2635089 nnz = cb_idx >> 8 & 15;
1864
2/2
✓ Branch 0 taken 1733779 times.
✓ Branch 1 taken 901310 times.
2635089 bits = nnz ? GET_CACHE(re, gb) : 0;
1865 2635089 LAST_SKIP_BITS(re, gb, nnz);
1866 #if USE_FIXED
1867 825340 cf = DEC_UQUAD(cf, cb_idx, bits);
1868 #else
1869 1809749 cf = VMUL4S(cf, vq, cb_idx, bits, sf + idx);
1870 #endif /* USE_FIXED */
1871
2/2
✓ Branch 0 taken 2043784 times.
✓ Branch 1 taken 591305 times.
2635089 } while (len -= 4);
1872 }
1873 578848 break;
1874
1875 399520 case 2:
1876
2/2
✓ Branch 0 taken 412245 times.
✓ Branch 1 taken 399520 times.
811765 for (group = 0; group < (AAC_SIGNE)g_len; group++, cfo+=128) {
1877 412245 INTFLOAT *cf = cfo;
1878 412245 int len = off_len;
1879
1880 do {
1881 int code;
1882 unsigned cb_idx;
1883
1884 2497594 UPDATE_CACHE(re, gb);
1885
2/2
✓ Branch 1 taken 87434 times.
✓ Branch 2 taken 2410160 times.
2497594 GET_VLC(code, re, gb, vlc_tab, 8, 2);
1886 2497594 cb_idx = code;
1887 #if USE_FIXED
1888 682784 cf = DEC_SPAIR(cf, cb_idx);
1889 #else
1890 1814810 cf = VMUL2(cf, vq, cb_idx, sf + idx);
1891 #endif /* USE_FIXED */
1892
2/2
✓ Branch 0 taken 2085349 times.
✓ Branch 1 taken 412245 times.
2497594 } while (len -= 2);
1893 }
1894 399520 break;
1895
1896 543934 case 3:
1897 case 4:
1898
2/2
✓ Branch 0 taken 562533 times.
✓ Branch 1 taken 543934 times.
1106467 for (group = 0; group < (AAC_SIGNE)g_len; group++, cfo+=128) {
1899 562533 INTFLOAT *cf = cfo;
1900 562533 int len = off_len;
1901
1902 do {
1903 int code;
1904 unsigned nnz;
1905 unsigned cb_idx;
1906 unsigned sign;
1907
1908 2981574 UPDATE_CACHE(re, gb);
1909
2/2
✓ Branch 1 taken 212207 times.
✓ Branch 2 taken 2769367 times.
2981574 GET_VLC(code, re, gb, vlc_tab, 8, 2);
1910 2981574 cb_idx = code;
1911 2981574 nnz = cb_idx >> 8 & 15;
1912
2/2
✓ Branch 0 taken 2374558 times.
✓ Branch 1 taken 607016 times.
2981574 sign = nnz ? SHOW_UBITS(re, gb, nnz) << (cb_idx >> 12) : 0;
1913 2981574 LAST_SKIP_BITS(re, gb, nnz);
1914 #if USE_FIXED
1915 707574 cf = DEC_UPAIR(cf, cb_idx, sign);
1916 #else
1917 2274000 cf = VMUL2S(cf, vq, cb_idx, sign, sf + idx);
1918 #endif /* USE_FIXED */
1919
2/2
✓ Branch 0 taken 2419041 times.
✓ Branch 1 taken 562533 times.
2981574 } while (len -= 2);
1920 }
1921 543934 break;
1922
1923 438826 default:
1924
2/2
✓ Branch 0 taken 448746 times.
✓ Branch 1 taken 438826 times.
887572 for (group = 0; group < (AAC_SIGNE)g_len; group++, cfo+=128) {
1925 #if USE_FIXED
1926 119421 int *icf = cfo;
1927 int v;
1928 #else
1929 329325 float *cf = cfo;
1930 329325 uint32_t *icf = (uint32_t *) cf;
1931 #endif /* USE_FIXED */
1932 448746 int len = off_len;
1933
1934 do {
1935 int code;
1936 unsigned nzt, nnz;
1937 unsigned cb_idx;
1938 uint32_t bits;
1939 int j;
1940
1941 1486272 UPDATE_CACHE(re, gb);
1942
2/2
✓ Branch 1 taken 424481 times.
✓ Branch 2 taken 1061791 times.
1486272 GET_VLC(code, re, gb, vlc_tab, 8, 2);
1943 1486272 cb_idx = code;
1944
1945
2/2
✓ Branch 0 taken 70723 times.
✓ Branch 1 taken 1415549 times.
1486272 if (cb_idx == 0x0000) {
1946 70723 *icf++ = 0;
1947 70723 *icf++ = 0;
1948 70723 continue;
1949 }
1950
1951 1415549 nnz = cb_idx >> 12;
1952 1415549 nzt = cb_idx >> 8;
1953 1415549 bits = SHOW_UBITS(re, gb, nnz) << (32-nnz);
1954 1415549 LAST_SKIP_BITS(re, gb, nnz);
1955
1956
2/2
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✓ Branch 1 taken 1415549 times.
4246647 for (j = 0; j < 2; j++) {
1957
2/2
✓ Branch 0 taken 365049 times.
✓ Branch 1 taken 2466049 times.
2831098 if (nzt & 1<<j) {
1958 uint32_t b;
1959 int n;
1960 /* The total length of escape_sequence must be < 22 bits according
1961 to the specification (i.e. max is 111111110xxxxxxxxxxxx). */
1962 365049 UPDATE_CACHE(re, gb);
1963 365049 b = GET_CACHE(re, gb);
1964 365049 b = 31 - av_log2(~b);
1965
1966
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 365049 times.
365049 if (b > 8) {
1967 av_log(ac->avctx, AV_LOG_ERROR, "error in spectral data, ESC overflow\n");
1968 return AVERROR_INVALIDDATA;
1969 }
1970
1971 365049 SKIP_BITS(re, gb, b + 1);
1972 365049 b += 4;
1973 365049 n = (1 << b) + SHOW_UBITS(re, gb, b);
1974 365049 LAST_SKIP_BITS(re, gb, b);
1975 #if USE_FIXED
1976 64965 v = n;
1977
2/2
✓ Branch 0 taken 32342 times.
✓ Branch 1 taken 32623 times.
64965 if (bits & 1U<<31)
1978 32342 v = -v;
1979 64965 *icf++ = v;
1980 #else
1981 300084 *icf++ = ff_cbrt_tab[n] | (bits & 1U<<31);
1982 #endif /* USE_FIXED */
1983 365049 bits <<= 1;
1984 } else {
1985 #if USE_FIXED
1986 539931 v = cb_idx & 15;
1987
2/2
✓ Branch 0 taken 256615 times.
✓ Branch 1 taken 283316 times.
539931 if (bits & 1U<<31)
1988 256615 v = -v;
1989 539931 *icf++ = v;
1990 #else
1991 1926118 unsigned v = ((const uint32_t*)vq)[cb_idx & 15];
1992 1926118 *icf++ = (bits & 1U<<31) | v;
1993 #endif /* USE_FIXED */
1994 2466049 bits <<= !!v;
1995 }
1996 2831098 cb_idx >>= 4;
1997 }
1998
2/2
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✓ Branch 1 taken 448746 times.
1486272 } while (len -= 2);
1999 #if !USE_FIXED
2000 329325 ac->fdsp->vector_fmul_scalar(cfo, cfo, sf[idx], off_len);
2001 #endif /* !USE_FIXED */
2002 }
2003 }
2004
2005 2589954 CLOSE_READER(re, gb);
2006 }
2007 }
2008 98974 coef += g_len << 7;
2009 }
2010
2011
2/2
✓ Branch 0 taken 1098 times.
✓ Branch 1 taken 92638 times.
93736 if (pulse_present) {
2012 1098 idx = 0;
2013
2/2
✓ Branch 0 taken 2744 times.
✓ Branch 1 taken 1098 times.
3842 for (i = 0; i < pulse->num_pulse; i++) {
2014 2744 INTFLOAT co = coef_base[ pulse->pos[i] ];
2015
2/2
✓ Branch 0 taken 4096 times.
✓ Branch 1 taken 2744 times.
6840 while (offsets[idx + 1] <= pulse->pos[i])
2016 4096 idx++;
2017
3/4
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✗ Branch 1 not taken.
✓ Branch 2 taken 2668 times.
✓ Branch 3 taken 76 times.
2744 if (band_type[idx] != NOISE_BT && sf[idx]) {
2018 2668 INTFLOAT ico = -pulse->amp[i];
2019 #if USE_FIXED
2020
2/2
✓ Branch 0 taken 730 times.
✓ Branch 1 taken 134 times.
864 if (co) {
2021
2/2
✓ Branch 0 taken 379 times.
✓ Branch 1 taken 351 times.
730 ico = co + (co > 0 ? -ico : ico);
2022 }
2023 864 coef_base[ pulse->pos[i] ] = ico;
2024 #else
2025
2/2
✓ Branch 0 taken 1564 times.
✓ Branch 1 taken 240 times.
1804 if (co) {
2026 1564 co /= sf[idx];
2027
2/2
✓ Branch 0 taken 799 times.
✓ Branch 1 taken 765 times.
1564 ico = co / sqrtf(sqrtf(fabsf(co))) + (co > 0 ? -ico : ico);
2028 }
2029 1804 coef_base[ pulse->pos[i] ] = cbrtf(fabsf(ico)) * ico * sf[idx];
2030 #endif /* USE_FIXED */
2031 }
2032 }
2033 }
2034 #if USE_FIXED
2035 28862 coef = coef_base;
2036 28862 idx = 0;
2037
2/2
✓ Branch 0 taken 31194 times.
✓ Branch 1 taken 28862 times.
60056 for (g = 0; g < ics->num_window_groups; g++) {
2038 31194 unsigned g_len = ics->group_len[g];
2039
2040
2/2
✓ Branch 0 taken 1046993 times.
✓ Branch 1 taken 31194 times.
1078187 for (i = 0; i < ics->max_sfb; i++, idx++) {
2041 1046993 const unsigned cbt_m1 = band_type[idx] - 1;
2042 1046993 int *cfo = coef + offsets[i];
2043 1046993 int off_len = offsets[i + 1] - offsets[i];
2044 int group;
2045
2046
2/2
✓ Branch 0 taken 779531 times.
✓ Branch 1 taken 267462 times.
1046993 if (cbt_m1 < NOISE_BT - 1) {
2047
2/2
✓ Branch 0 taken 795075 times.
✓ Branch 1 taken 779531 times.
1574606 for (group = 0; group < (int)g_len; group++, cfo+=128) {
2048 795075 ac->vector_pow43(cfo, off_len);
2049 795075 ac->subband_scale(cfo, cfo, sf[idx], 34, off_len, ac->avctx);
2050 }
2051 }
2052 }
2053 31194 coef += g_len << 7;
2054 }
2055 #endif /* USE_FIXED */
2056 93736 return 0;
2057 }
2058
2059 /**
2060 * Apply AAC-Main style frequency domain prediction.
2061 */
2062 7388 static void apply_prediction(AACContext *ac, SingleChannelElement *sce)
2063 {
2064 int sfb, k;
2065
2066
2/2
✓ Branch 0 taken 20 times.
✓ Branch 1 taken 7368 times.
7388 if (!sce->ics.predictor_initialized) {
2067 20 reset_all_predictors(sce->predictor_state);
2068 20 sce->ics.predictor_initialized = 1;
2069 }
2070
2071
2/2
✓ Branch 0 taken 7368 times.
✓ Branch 1 taken 20 times.
7388 if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
2072 7368 for (sfb = 0;
2073
2/2
✓ Branch 0 taken 255198 times.
✓ Branch 1 taken 7368 times.
262566 sfb < ff_aac_pred_sfb_max[ac->oc[1].m4ac.sampling_index];
2074 255198 sfb++) {
2075 255198 for (k = sce->ics.swb_offset[sfb];
2076
2/2
✓ Branch 0 taken 4047936 times.
✓ Branch 1 taken 255198 times.
4303134 k < sce->ics.swb_offset[sfb + 1];
2077 4047936 k++) {
2078 4047936 predict(&sce->predictor_state[k], &sce->coeffs[k],
2079
2/2
✓ Branch 0 taken 892992 times.
✓ Branch 1 taken 3154944 times.
4047936 sce->ics.predictor_present &&
2080
2/2
✓ Branch 0 taken 271896 times.
✓ Branch 1 taken 621096 times.
892992 sce->ics.prediction_used[sfb]);
2081 }
2082 }
2083
2/2
✓ Branch 0 taken 518 times.
✓ Branch 1 taken 6850 times.
7368 if (sce->ics.predictor_reset_group)
2084 518 reset_predictor_group(sce->predictor_state,
2085 sce->ics.predictor_reset_group);
2086 } else
2087 20 reset_all_predictors(sce->predictor_state);
2088 7388 }
2089
2090 static void decode_gain_control(SingleChannelElement * sce, GetBitContext * gb)
2091 {
2092 // wd_num, wd_test, aloc_size
2093 static const uint8_t gain_mode[4][3] = {
2094 {1, 0, 5}, // ONLY_LONG_SEQUENCE = 0,
2095 {2, 1, 2}, // LONG_START_SEQUENCE,
2096 {8, 0, 2}, // EIGHT_SHORT_SEQUENCE,
2097 {2, 1, 5}, // LONG_STOP_SEQUENCE
2098 };
2099
2100 const int mode = sce->ics.window_sequence[0];
2101 uint8_t bd, wd, ad;
2102
2103 // FIXME: Store the gain control data on |sce| and do something with it.
2104 uint8_t max_band = get_bits(gb, 2);
2105 for (bd = 0; bd < max_band; bd++) {
2106 for (wd = 0; wd < gain_mode[mode][0]; wd++) {
2107 uint8_t adjust_num = get_bits(gb, 3);
2108 for (ad = 0; ad < adjust_num; ad++) {
2109 skip_bits(gb, 4 + ((wd == 0 && gain_mode[mode][1])
2110 ? 4
2111 : gain_mode[mode][2]));
2112 }
2113 }
2114 }
2115 }
2116
2117 /**
2118 * Decode an individual_channel_stream payload; reference: table 4.44.
2119 *
2120 * @param common_window Channels have independent [0], or shared [1], Individual Channel Stream information.
2121 * @param scale_flag scalable [1] or non-scalable [0] AAC (Unused until scalable AAC is implemented.)
2122 *
2123 * @return Returns error status. 0 - OK, !0 - error
2124 */
2125 93736 static int decode_ics(AACContext *ac, SingleChannelElement *sce,
2126 GetBitContext *gb, int common_window, int scale_flag)
2127 {
2128 Pulse pulse;
2129 93736 TemporalNoiseShaping *tns = &sce->tns;
2130 93736 IndividualChannelStream *ics = &sce->ics;
2131 93736 INTFLOAT *out = sce->coeffs;
2132 93736 int global_gain, eld_syntax, er_syntax, pulse_present = 0;
2133 int ret;
2134
2135 93736 eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
2136 281208 er_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_LC ||
2137
1/2
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✗ Branch 1 not taken.
93736 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LTP ||
2138
3/4
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✗ Branch 1 not taken.
✓ Branch 2 taken 90100 times.
✓ Branch 3 taken 3636 times.
277572 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LD ||
2139
2/2
✓ Branch 0 taken 26598 times.
✓ Branch 1 taken 63502 times.
90100 ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
2140
2141 /* This assignment is to silence a GCC warning about the variable being used
2142 * uninitialized when in fact it always is.
2143 */
2144 93736 pulse.num_pulse = 0;
2145
2146 93736 global_gain = get_bits(gb, 8);
2147
2148
3/4
✓ Branch 0 taken 32808 times.
✓ Branch 1 taken 60928 times.
✓ Branch 2 taken 32808 times.
✗ Branch 3 not taken.
93736 if (!common_window && !scale_flag) {
2149 32808 ret = decode_ics_info(ac, ics, gb);
2150
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 32808 times.
32808 if (ret < 0)
2151 goto fail;
2152 }
2153
2154
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 93736 times.
93736 if ((ret = decode_band_types(ac, sce->band_type,
2155 93736 sce->band_type_run_end, gb, ics)) < 0)
2156 goto fail;
2157
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 93736 times.
93736 if ((ret = decode_scalefactors(ac, sce->sf, gb, global_gain, ics,
2158 93736 sce->band_type, sce->band_type_run_end)) < 0)
2159 goto fail;
2160
2161 93736 pulse_present = 0;
2162
1/2
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✗ Branch 1 not taken.
93736 if (!scale_flag) {
2163
4/4
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✓ Branch 1 taken 26598 times.
✓ Branch 3 taken 1098 times.
✓ Branch 4 taken 66040 times.
93736 if (!eld_syntax && (pulse_present = get_bits1(gb))) {
2164
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1098 times.
1098 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2165 av_log(ac->avctx, AV_LOG_ERROR,
2166 "Pulse tool not allowed in eight short sequence.\n");
2167 ret = AVERROR_INVALIDDATA;
2168 goto fail;
2169 }
2170
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1098 times.
1098 if (decode_pulses(&pulse, gb, ics->swb_offset, ics->num_swb)) {
2171 av_log(ac->avctx, AV_LOG_ERROR,
2172 "Pulse data corrupt or invalid.\n");
2173 ret = AVERROR_INVALIDDATA;
2174 goto fail;
2175 }
2176 }
2177 93736 tns->present = get_bits1(gb);
2178
4/4
✓ Branch 0 taken 6927 times.
✓ Branch 1 taken 86809 times.
✓ Branch 2 taken 5663 times.
✓ Branch 3 taken 1264 times.
93736 if (tns->present && !er_syntax) {
2179 5663 ret = decode_tns(ac, tns, gb, ics);
2180
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5663 times.
5663 if (ret < 0)
2181 goto fail;
2182 }
2183
3/4
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✓ Branch 1 taken 26598 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 67138 times.
93736 if (!eld_syntax && get_bits1(gb)) {
2184 decode_gain_control(sce, gb);
2185 if (!ac->warned_gain_control) {
2186 avpriv_report_missing_feature(ac->avctx, "Gain control");
2187 ac->warned_gain_control = 1;
2188 }
2189 }
2190 // I see no textual basis in the spec for this occurring after SSR gain
2191 // control, but this is what both reference and real implmentations do
2192
4/4
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✓ Branch 2 taken 1264 times.
✓ Branch 3 taken 5663 times.
93736 if (tns->present && er_syntax) {
2193 1264 ret = decode_tns(ac, tns, gb, ics);
2194
1/2
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1264 if (ret < 0)
2195 goto fail;
2196 }
2197 }
2198
2199 93736 ret = decode_spectrum_and_dequant(ac, out, gb, sce->sf, pulse_present,
2200 93736 &pulse, ics, sce->band_type);
2201
1/2
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93736 if (ret < 0)
2202 goto fail;
2203
2204
4/4
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✓ Branch 2 taken 6094 times.
✓ Branch 3 taken 1294 times.
93736 if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN && !common_window)
2205 6094 apply_prediction(ac, sce);
2206
2207 93736 return 0;
2208 fail:
2209 tns->present = 0;
2210 return ret;
2211 }
2212
2213 /**
2214 * Mid/Side stereo decoding; reference: 4.6.8.1.3.
2215 */
2216 26972 static void apply_mid_side_stereo(AACContext *ac, ChannelElement *cpe)
2217 {
2218 26972 const IndividualChannelStream *ics = &cpe->ch[0].ics;
2219 26972 INTFLOAT *ch0 = cpe->ch[0].coeffs;
2220 26972 INTFLOAT *ch1 = cpe->ch[1].coeffs;
2221 26972 int g, i, group, idx = 0;
2222 26972 const uint16_t *offsets = ics->swb_offset;
2223
2/2
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55649 for (g = 0; g < ics->num_window_groups; g++) {
2224
2/2
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✓ Branch 1 taken 28677 times.
1041653 for (i = 0; i < ics->max_sfb; i++, idx++) {
2225
2/2
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✓ Branch 1 taken 217586 times.
1012976 if (cpe->ms_mask[idx] &&
2226
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✗ Branch 1 not taken.
795390 cpe->ch[0].band_type[idx] < NOISE_BT &&
2227
2/2
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✓ Branch 1 taken 2376 times.
795390 cpe->ch[1].band_type[idx] < NOISE_BT) {
2228 #if USE_FIXED
2229
2/2
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✓ Branch 1 taken 247459 times.
500617 for (group = 0; group < ics->group_len[g]; group++) {
2230 253158 ac->fdsp->butterflies_fixed(ch0 + group * 128 + offsets[i],
2231 253158 ch1 + group * 128 + offsets[i],
2232 253158 offsets[i+1] - offsets[i]);
2233 #else
2234
2/2
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✓ Branch 1 taken 545555 times.
1115598 for (group = 0; group < ics->group_len[g]; group++) {
2235 570043 ac->fdsp->butterflies_float(ch0 + group * 128 + offsets[i],
2236 570043 ch1 + group * 128 + offsets[i],
2237 570043 offsets[i+1] - offsets[i]);
2238 #endif /* USE_FIXED */
2239 }
2240 }
2241 }
2242 28677 ch0 += ics->group_len[g] * 128;
2243 28677 ch1 += ics->group_len[g] * 128;
2244 }
2245 26972 }
2246
2247 /**
2248 * intensity stereo decoding; reference: 4.6.8.2.3
2249 *
2250 * @param ms_present Indicates mid/side stereo presence. [0] mask is all 0s;
2251 * [1] mask is decoded from bitstream; [2] mask is all 1s;
2252 * [3] reserved for scalable AAC
2253 */
2254 30686 static void apply_intensity_stereo(AACContext *ac,
2255 ChannelElement *cpe, int ms_present)
2256 {
2257 30686 const IndividualChannelStream *ics = &cpe->ch[1].ics;
2258 30686 SingleChannelElement *sce1 = &cpe->ch[1];
2259 30686 INTFLOAT *coef0 = cpe->ch[0].coeffs, *coef1 = cpe->ch[1].coeffs;
2260 30686 const uint16_t *offsets = ics->swb_offset;
2261 30686 int g, group, i, idx = 0;
2262 int c;
2263 INTFLOAT scale;
2264
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63300 for (g = 0; g < ics->num_window_groups; g++) {
2265
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✓ Branch 1 taken 32614 times.
193378 for (i = 0; i < ics->max_sfb;) {
2266
2/2
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✓ Branch 1 taken 9472 times.
160764 if (sce1->band_type[idx] == INTENSITY_BT ||
2267
2/2
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✓ Branch 1 taken 151181 times.
160875 sce1->band_type[idx] == INTENSITY_BT2) {
2268 9583 const int bt_run_end = sce1->band_type_run_end[idx];
2269
2/2
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✓ Branch 1 taken 9583 times.
75790 for (; i < bt_run_end; i++, idx++) {
2270 66207 c = -1 + 2 * (sce1->band_type[idx] - 14);
2271
2/2
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✓ Branch 1 taken 4883 times.
66207 if (ms_present)
2272 61324 c *= 1 - 2 * cpe->ms_mask[idx];
2273 66207 scale = c * sce1->sf[idx];
2274
2/2
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✓ Branch 1 taken 66207 times.
132745 for (group = 0; group < ics->group_len[g]; group++)
2275 #if USE_FIXED
2276 17955 ac->subband_scale(coef1 + group * 128 + offsets[i],
2277 17955 coef0 + group * 128 + offsets[i],
2278 scale,
2279 23,
2280 17955 offsets[i + 1] - offsets[i] ,ac->avctx);
2281 #else
2282 48583 ac->fdsp->vector_fmul_scalar(coef1 + group * 128 + offsets[i],
2283 48583 coef0 + group * 128 + offsets[i],
2284 scale,
2285 48583 offsets[i + 1] - offsets[i]);
2286 #endif /* USE_FIXED */
2287 }
2288 } else {
2289 151181 int bt_run_end = sce1->band_type_run_end[idx];
2290 151181 idx += bt_run_end - i;
2291 151181 i = bt_run_end;
2292 }
2293 }
2294 32614 coef0 += ics->group_len[g] * 128;
2295 32614 coef1 += ics->group_len[g] * 128;
2296 }
2297 30686 }
2298
2299 /**
2300 * Decode a channel_pair_element; reference: table 4.4.
2301 *
2302 * @return Returns error status. 0 - OK, !0 - error
2303 */
2304 30686 static int decode_cpe(AACContext *ac, GetBitContext *gb, ChannelElement *cpe)
2305 {
2306 30686 int i, ret, common_window, ms_present = 0;
2307 30686 int eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
2308
2309
4/4
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✓ Branch 4 taken 222 times.
30686 common_window = eld_syntax || get_bits1(gb);
2310
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✓ Branch 1 taken 222 times.
30686 if (common_window) {
2311
1/2
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30464 if (decode_ics_info(ac, &cpe->ch[0].ics, gb))
2312 return AVERROR_INVALIDDATA;
2313 30464 i = cpe->ch[1].ics.use_kb_window[0];
2314 30464 cpe->ch[1].ics = cpe->ch[0].ics;
2315 30464 cpe->ch[1].ics.use_kb_window[1] = i;
2316
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✓ Branch 1 taken 29741 times.
30464 if (cpe->ch[1].ics.predictor_present &&
2317
2/2
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✓ Branch 1 taken 185 times.
723 (ac->oc[1].m4ac.object_type != AOT_AAC_MAIN))
2318
2/2
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✓ Branch 2 taken 134 times.
538 if ((cpe->ch[1].ics.ltp.present = get_bits(gb, 1)))
2319 404 decode_ltp(&cpe->ch[1].ics.ltp, gb, cpe->ch[1].ics.max_sfb);
2320 30464 ms_present = get_bits(gb, 2);
2321
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30464 if (ms_present == 3) {
2322 av_log(ac->avctx, AV_LOG_ERROR, "ms_present = 3 is reserved.\n");
2323 return AVERROR_INVALIDDATA;
2324
2/2
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✓ Branch 1 taken 3492 times.
30464 } else if (ms_present)
2325 26972 decode_mid_side_stereo(cpe, gb, ms_present);
2326 }
2327
1/2
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✓ Branch 2 taken 30686 times.
30686 if ((ret = decode_ics(ac, &cpe->ch[0], gb, common_window, 0)))
2328 return ret;
2329
1/2
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✓ Branch 2 taken 30686 times.
30686 if ((ret = decode_ics(ac, &cpe->ch[1], gb, common_window, 0)))
2330 return ret;
2331
2332
2/2
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✓ Branch 1 taken 222 times.
30686 if (common_window) {
2333
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✓ Branch 1 taken 3492 times.
30464 if (ms_present)
2334 26972 apply_mid_side_stereo(ac, cpe);
2335
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✓ Branch 1 taken 29817 times.
30464 if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN) {
2336 647 apply_prediction(ac, &cpe->ch[0]);
2337 647 apply_prediction(ac, &cpe->ch[1]);
2338 }
2339 }
2340
2341 30686 apply_intensity_stereo(ac, cpe, ms_present);
2342 30686 return 0;
2343 }
2344
2345 static const float cce_scale[] = {
2346 1.09050773266525765921, //2^(1/8)
2347 1.18920711500272106672, //2^(1/4)
2348 M_SQRT2,
2349 2,
2350 };
2351
2352 /**
2353 * Decode coupling_channel_element; reference: table 4.8.
2354 *
2355 * @return Returns error status. 0 - OK, !0 - error
2356 */
2357 1174 static int decode_cce(AACContext *ac, GetBitContext *gb, ChannelElement *che)
2358 {
2359 1174 int num_gain = 0;
2360 int c, g, sfb, ret;
2361 int sign;
2362 INTFLOAT scale;
2363 1174 SingleChannelElement *sce = &che->ch[0];
2364 1174 ChannelCoupling *coup = &che->coup;
2365
2366 1174 coup->coupling_point = 2 * get_bits1(gb);
2367 1174 coup->num_coupled = get_bits(gb, 3);
2368
2/2
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✓ Branch 1 taken 1174 times.
3915 for (c = 0; c <= coup->num_coupled; c++) {
2369 2741 num_gain++;
2370 2741 coup->type[c] = get_bits1(gb) ? TYPE_CPE : TYPE_SCE;
2371 2741 coup->id_select[c] = get_bits(gb, 4);
2372
2/2
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✓ Branch 1 taken 393 times.
2741 if (coup->type[c] == TYPE_CPE) {
2373 2348 coup->ch_select[c] = get_bits(gb, 2);
2374
2/2
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✓ Branch 1 taken 381 times.
2348 if (coup->ch_select[c] == 3)
2375 1967 num_gain++;
2376 } else
2377 393 coup->ch_select[c] = 2;
2378 }
2379
4/4
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✓ Branch 3 taken 152 times.
✓ Branch 4 taken 450 times.
1174 coup->coupling_point += get_bits1(gb) || (coup->coupling_point >> 1);
2380
2381 1174 sign = get_bits(gb, 1);
2382 #if USE_FIXED
2383 130 scale = get_bits(gb, 2);
2384 #else
2385 1044 scale = cce_scale[get_bits(gb, 2)];
2386 #endif
2387
2388
1/2
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1174 if ((ret = decode_ics(ac, sce, gb, 0, 0)))
2389 return ret;
2390
2391
2/2
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✓ Branch 1 taken 1174 times.
5882 for (c = 0; c < num_gain; c++) {
2392 4708 int idx = 0;
2393 4708 int cge = 1;
2394 4708 int gain = 0;
2395 4708 INTFLOAT gain_cache = FIXR10(1.);
2396
2/2
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4708 if (c) {
2397
2/2
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✓ Branch 1 taken 1572 times.
3534 cge = coup->coupling_point == AFTER_IMDCT ? 1 : get_bits1(gb);
2398
2/2
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✓ Branch 1 taken 1561 times.
3534 gain = cge ? get_vlc2(gb, vlc_scalefactors.table, 7, 3) - 60: 0;
2399 3534 gain_cache = GET_GAIN(scale, gain);
2400 #if USE_FIXED
2401
1/2
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✓ Branch 1 taken 520 times.
520 if ((abs(gain_cache)-1024) >> 3 > 30)
2402 return AVERROR(ERANGE);
2403 #endif
2404 }
2405
2/2
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✓ Branch 1 taken 2743 times.
4708 if (coup->coupling_point == AFTER_IMDCT) {
2406 1965 coup->gain[c][0] = gain_cache;
2407 } else {
2408
2/2
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5486 for (g = 0; g < sce->ics.num_window_groups; g++) {
2409
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✓ Branch 1 taken 2743 times.
112463 for (sfb = 0; sfb < sce->ics.max_sfb; sfb++, idx++) {
2410
2/2
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✓ Branch 1 taken 104524 times.
109720 if (sce->band_type[idx] != ZERO_BT) {
2411
2/2
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✓ Branch 1 taken 2317 times.
5196 if (!cge) {
2412 2879 int t = get_vlc2(gb, vlc_scalefactors.table, 7, 3) - 60;
2413
2/2
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✓ Branch 1 taken 155 times.
2879 if (t) {
2414 2724 int s = 1;
2415 2724 t = gain += t;
2416
2/2
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✓ Branch 1 taken 1058 times.
2724 if (sign) {
2417 1666 s -= 2 * (t & 0x1);
2418 1666 t >>= 1;
2419 }
2420 2724 gain_cache = GET_GAIN(scale, t) * s;
2421 #if USE_FIXED
2422 if ((abs(gain_cache)-1024) >> 3 > 30)
2423 return AVERROR(ERANGE);
2424 #endif
2425 }
2426 }
2427 5196 coup->gain[c][idx] = gain_cache;
2428 }
2429 }
2430 }
2431 }
2432 }
2433 1174 return 0;
2434 }
2435
2436 /**
2437 * Parse whether channels are to be excluded from Dynamic Range Compression; reference: table 4.53.
2438 *
2439 * @return Returns number of bytes consumed.
2440 */
2441 4 static int decode_drc_channel_exclusions(DynamicRangeControl *che_drc,
2442 GetBitContext *gb)
2443 {
2444 int i;
2445 4 int num_excl_chan = 0;
2446
2447 do {
2448
2/2
✓ Branch 0 taken 28 times.
✓ Branch 1 taken 4 times.
32 for (i = 0; i < 7; i++)
2449 28 che_drc->exclude_mask[num_excl_chan++] = get_bits1(gb);
2450
2/4
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✗ Branch 1 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 4 times.
4 } while (num_excl_chan < MAX_CHANNELS - 7 && get_bits1(gb));
2451
2452 4 return num_excl_chan / 7;
2453 }
2454
2455 /**
2456 * Decode dynamic range information; reference: table 4.52.
2457 *
2458 * @return Returns number of bytes consumed.
2459 */
2460 880 static int decode_dynamic_range(DynamicRangeControl *che_drc,
2461 GetBitContext *gb)
2462 {
2463 880 int n = 1;
2464 880 int drc_num_bands = 1;
2465 int i;
2466
2467 /* pce_tag_present? */
2468
1/2
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✓ Branch 2 taken 880 times.
880 if (get_bits1(gb)) {
2469 che_drc->pce_instance_tag = get_bits(gb, 4);
2470 skip_bits(gb, 4); // tag_reserved_bits
2471 n++;
2472 }
2473
2474 /* excluded_chns_present? */
2475
2/2
✓ Branch 1 taken 4 times.
✓ Branch 2 taken 876 times.
880 if (get_bits1(gb)) {
2476 4 n += decode_drc_channel_exclusions(che_drc, gb);
2477 }
2478
2479 /* drc_bands_present? */
2480
2/2
✓ Branch 1 taken 35 times.
✓ Branch 2 taken 845 times.
880 if (get_bits1(gb)) {
2481 35 che_drc->band_incr = get_bits(gb, 4);
2482 35 che_drc->interpolation_scheme = get_bits(gb, 4);
2483 35 n++;
2484 35 drc_num_bands += che_drc->band_incr;
2485
2/2
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✓ Branch 1 taken 35 times.
140 for (i = 0; i < drc_num_bands; i++) {
2486 105 che_drc->band_top[i] = get_bits(gb, 8);
2487 105 n++;
2488 }
2489 }
2490
2491 /* prog_ref_level_present? */
2492
2/2
✓ Branch 1 taken 878 times.
✓ Branch 2 taken 2 times.
880 if (get_bits1(gb)) {
2493 878 che_drc->prog_ref_level = get_bits(gb, 7);
2494 878 skip_bits1(gb); // prog_ref_level_reserved_bits
2495 878 n++;
2496 }
2497
2498
2/2
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1830 for (i = 0; i < drc_num_bands; i++) {
2499 950 che_drc->dyn_rng_sgn[i] = get_bits1(gb);
2500 950 che_drc->dyn_rng_ctl[i] = get_bits(gb, 7);
2501 950 n++;
2502 }
2503
2504 880 return n;
2505 }
2506
2507 8949 static int decode_fill(AACContext *ac, GetBitContext *gb, int len) {
2508 uint8_t buf[256];
2509 int i, major, minor;
2510
2511
2/2
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✓ Branch 1 taken 8569 times.
8949 if (len < 13+7*8)
2512 380 goto unknown;
2513
2514 8569 get_bits(gb, 13); len -= 13;
2515
2516
4/4
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✓ Branch 2 taken 1128145 times.
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1136714 for(i=0; i+1<sizeof(buf) && len>=8; i++, len-=8)
2517 1128145 buf[i] = get_bits(gb, 8);
2518
2519 8569 buf[i] = 0;
2520
1/2
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✓ Branch 1 taken 8569 times.
8569 if (ac->avctx->debug & FF_DEBUG_PICT_INFO)
2521 av_log(ac->avctx, AV_LOG_DEBUG, "FILL:%s\n", buf);
2522
2523
2/2
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✓ Branch 1 taken 19 times.
8569 if (sscanf(buf, "libfaac %d.%d", &major, &minor) == 2){
2524 19 ac->avctx->internal->skip_samples = 1024;
2525 }
2526
2527 8550 unknown:
2528 8949 skip_bits_long(gb, len);
2529
2530 8949 return 0;
2531 }
2532
2533 /**
2534 * Decode extension data (incomplete); reference: table 4.51.
2535 *
2536 * @param cnt length of TYPE_FIL syntactic element in bytes
2537 *
2538 * @return Returns number of bytes consumed
2539 */
2540 23680 static int decode_extension_payload(AACContext *ac, GetBitContext *gb, int cnt,
2541 ChannelElement *che, enum RawDataBlockType elem_type)
2542 {
2543 23680 int crc_flag = 0;
2544 23680 int res = cnt;
2545 23680 int type = get_bits(gb, 4);
2546
2547
1/2
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✓ Branch 1 taken 23680 times.
23680 if (ac->avctx->debug & FF_DEBUG_STARTCODE)
2548 av_log(ac->avctx, AV_LOG_DEBUG, "extension type: %d len:%d\n", type, cnt);
2549
2550
4/5
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✓ Branch 3 taken 8949 times.
✓ Branch 4 taken 2950 times.
23680 switch (type) { // extension type
2551 case EXT_SBR_DATA_CRC:
2552 crc_flag++;
2553 10901 case EXT_SBR_DATA:
2554
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10901 times.
10901 if (!che) {
2555 av_log(ac->avctx, AV_LOG_ERROR, "SBR was found before the first channel element.\n");
2556 return res;
2557
1/2
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✓ Branch 1 taken 10901 times.
10901 } else if (ac->oc[1].m4ac.frame_length_short) {
2558 if (!ac->warned_960_sbr)
2559 avpriv_report_missing_feature(ac->avctx,
2560 "SBR with 960 frame length");
2561 ac->warned_960_sbr = 1;
2562 skip_bits_long(gb, 8 * cnt - 4);
2563 return res;
2564
1/2
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✓ Branch 1 taken 10901 times.
10901 } else if (!ac->oc[1].m4ac.sbr) {
2565 av_log(ac->avctx, AV_LOG_ERROR, "SBR signaled to be not-present but was found in the bitstream.\n");
2566 skip_bits_long(gb, 8 * cnt - 4);
2567 return res;
2568
3/4
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✗ Branch 2 not taken.
✓ Branch 3 taken 22 times.
10901 } else if (ac->oc[1].m4ac.sbr == -1 && ac->oc[1].status == OC_LOCKED) {
2569 av_log(ac->avctx, AV_LOG_ERROR, "Implicit SBR was found with a first occurrence after the first frame.\n");
2570 skip_bits_long(gb, 8 * cnt - 4);
2571 return res;
2572
3/4
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✓ Branch 1 taken 10807 times.
✓ Branch 2 taken 94 times.
✗ Branch 3 not taken.
10901 } else if (ac->oc[1].m4ac.ps == -1 && ac->oc[1].status < OC_LOCKED &&
2573
2/2
✓ Branch 0 taken 12 times.
✓ Branch 1 taken 82 times.
94 ac->avctx->ch_layout.nb_channels == 1) {
2574 12 ac->oc[1].m4ac.sbr = 1;
2575 12 ac->oc[1].m4ac.ps = 1;
2576 12 ac->avctx->profile = FF_PROFILE_AAC_HE_V2;
2577 12 output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
2578 ac->oc[1].status, 1);
2579 } else {
2580 10889 ac->oc[1].m4ac.sbr = 1;
2581 10889 ac->avctx->profile = FF_PROFILE_AAC_HE;
2582 }
2583 10901 res = AAC_RENAME(ff_decode_sbr_extension)(ac, &che->sbr, gb, crc_flag, cnt, elem_type);
2584 10901 break;
2585 880 case EXT_DYNAMIC_RANGE:
2586 880 res = decode_dynamic_range(&ac->che_drc, gb);
2587 880 break;
2588 8949 case EXT_FILL:
2589 8949 decode_fill(ac, gb, 8 * cnt - 4);
2590 8949 break;
2591 2950 case EXT_FILL_DATA:
2592 case EXT_DATA_ELEMENT:
2593 default:
2594 2950 skip_bits_long(gb, 8 * cnt - 4);
2595 2950 break;
2596 };
2597 23680 return res;
2598 }
2599
2600 /**
2601 * Decode Temporal Noise Shaping filter coefficients and apply all-pole filters; reference: 4.6.9.3.
2602 *
2603 * @param decode 1 if tool is used normally, 0 if tool is used in LTP.
2604 * @param coef spectral coefficients
2605 */
2606 6933 static void apply_tns(INTFLOAT coef_param[1024], TemporalNoiseShaping *tns,
2607 IndividualChannelStream *ics, int decode)
2608 {
2609 6933 const int mmm = FFMIN(ics->tns_max_bands, ics->max_sfb);
2610 int w, filt, m, i;
2611 int bottom, top, order, start, end, size, inc;
2612 INTFLOAT lpc[TNS_MAX_ORDER];
2613 INTFLOAT tmp[TNS_MAX_ORDER+1];
2614 6933 UINTFLOAT *coef = coef_param;
2615
2616
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6933 if(!mmm)
2617 6 return;
2618
2619
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18467 for (w = 0; w < ics->num_windows; w++) {
2620 11540 bottom = ics->num_swb;
2621
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20919 for (filt = 0; filt < tns->n_filt[w]; filt++) {
2622 9379 top = bottom;
2623 9379 bottom = FFMAX(0, top - tns->length[w][filt]);
2624 9379 order = tns->order[w][filt];
2625
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9379 if (order == 0)
2626 520 continue;
2627
2628 // tns_decode_coef
2629 8859 AAC_RENAME(compute_lpc_coefs)(tns->coef[w][filt], order, lpc, 0, 0, 0);
2630
2631
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8859 start = ics->swb_offset[FFMIN(bottom, mmm)];
2632
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8859 end = ics->swb_offset[FFMIN( top, mmm)];
2633
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8859 if ((size = end - start) <= 0)
2634 8 continue;
2635
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8851 if (tns->direction[w][filt]) {
2636 3590 inc = -1;
2637 3590 start = end - 1;
2638 } else {
2639 5261 inc = 1;
2640 }
2641 8851 start += w * 128;
2642
2643
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8851 if (decode) {
2644 // ar filter
2645
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2738889 for (m = 0; m < size; m++, start += inc)
2646
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23883469 for (i = 1; i <= FFMIN(m, order); i++)
2647 21153425 coef[start] -= AAC_MUL26((INTFLOAT)coef[start - i * inc], lpc[i - 1]);
2648 } else {
2649 // ma filter
2650
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3702 for (m = 0; m < size; m++, start += inc) {
2651 3696 tmp[0] = coef[start];
2652
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39112 for (i = 1; i <= FFMIN(m, order); i++)
2653 35416 coef[start] += AAC_MUL26(tmp[i], lpc[i - 1]);
2654
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39424 for (i = order; i > 0; i--)
2655 35728 tmp[i] = tmp[i - 1];
2656 }
2657 }
2658 }
2659 }
2660 }
2661
2662 /**
2663 * Apply windowing and MDCT to obtain the spectral
2664 * coefficient from the predicted sample by LTP.
2665 */
2666 786 static void windowing_and_mdct_ltp(AACContext *ac, INTFLOAT *out,
2667 INTFLOAT *in, IndividualChannelStream *ics)
2668 {
2669
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786 const INTFLOAT *lwindow = ics->use_kb_window[0] ? AAC_RENAME2(aac_kbd_long_1024) : AAC_RENAME2(sine_1024);
2670
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786 const INTFLOAT *swindow = ics->use_kb_window[0] ? AAC_RENAME2(aac_kbd_short_128) : AAC_RENAME2(sine_128);
2671
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786 const INTFLOAT *lwindow_prev = ics->use_kb_window[1] ? AAC_RENAME2(aac_kbd_long_1024) : AAC_RENAME2(sine_1024);
2672
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786 const INTFLOAT *swindow_prev = ics->use_kb_window[1] ? AAC_RENAME2(aac_kbd_short_128) : AAC_RENAME2(sine_128);
2673
2674
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786 if (ics->window_sequence[0] != LONG_STOP_SEQUENCE) {
2675 784 ac->fdsp->vector_fmul(in, in, lwindow_prev, 1024);
2676 } else {
2677 2 memset(in, 0, 448 * sizeof(*in));
2678 2 ac->fdsp->vector_fmul(in + 448, in + 448, swindow_prev, 128);
2679 }
2680
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786 if (ics->window_sequence[0] != LONG_START_SEQUENCE) {
2681 786 ac->fdsp->vector_fmul_reverse(in + 1024, in + 1024, lwindow, 1024);
2682 } else {
2683 ac->fdsp->vector_fmul_reverse(in + 1024 + 448, in + 1024 + 448, swindow, 128);
2684 memset(in + 1024 + 576, 0, 448 * sizeof(*in));
2685 }
2686 786 ac->mdct_ltp.mdct_calc(&ac->mdct_ltp, out, in);
2687 786 }
2688
2689 /**
2690 * Apply the long term prediction
2691 */
2692 786 static void apply_ltp(AACContext *ac, SingleChannelElement *sce)
2693 {
2694 786 const LongTermPrediction *ltp = &sce->ics.ltp;
2695 786 const uint16_t *offsets = sce->ics.swb_offset;
2696 int i, sfb;
2697
2698
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786 if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
2699 786 INTFLOAT *predTime = sce->ret;
2700 786 INTFLOAT *predFreq = ac->buf_mdct;
2701 786 int16_t num_samples = 2048;
2702
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786 if (ltp->lag < 1024)
2704 num_samples = ltp->lag + 1024;
2705
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1610514 for (i = 0; i < num_samples; i++)
2706 1609728 predTime[i] = AAC_MUL30(sce->ltp_state[i + 2048 - ltp->lag], ltp->coef);
2707 786 memset(&predTime[i], 0, (2048 - i) * sizeof(*predTime));
2708
2709 786 ac->windowing_and_mdct_ltp(ac, predFreq, predTime, &sce->ics);
2710
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786 if (sce->tns.present)
2712 6 ac->apply_tns(predFreq, &sce->tns, &sce->ics, 0);
2713
2714
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32226 for (sfb = 0; sfb < FFMIN(sce->ics.max_sfb, MAX_LTP_LONG_SFB); sfb++)
2715
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31440 if (ltp->used[sfb])
2716
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370412 for (i = offsets[sfb]; i < offsets[sfb + 1]; i++)
2717 347544 sce->coeffs[i] += (UINTFLOAT)predFreq[i];
2718 }
2719 786 }
2720
2721 /**
2722 * Update the LTP buffer for next frame
2723 */
2724 3568 static void update_ltp(AACContext *ac, SingleChannelElement *sce)
2725 {
2726 3568 IndividualChannelStream *ics = &sce->ics;
2727 3568 INTFLOAT *saved = sce->saved;
2728 3568 INTFLOAT *saved_ltp = sce->coeffs;
2729
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3568 const INTFLOAT *lwindow = ics->use_kb_window[0] ? AAC_RENAME2(aac_kbd_long_1024) : AAC_RENAME2(sine_1024);
2730
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3568 const INTFLOAT *swindow = ics->use_kb_window[0] ? AAC_RENAME2(aac_kbd_short_128) : AAC_RENAME2(sine_128);
2731 int i;
2732
2733
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3568 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2734 4 memcpy(saved_ltp, saved, 512 * sizeof(*saved_ltp));
2735 4 memset(saved_ltp + 576, 0, 448 * sizeof(*saved_ltp));
2736 4 ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
2737
2738
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260 for (i = 0; i < 64; i++)
2739 256 saved_ltp[i + 512] = AAC_MUL31(ac->buf_mdct[1023 - i], swindow[63 - i]);
2740
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3564 } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
2741 4 memcpy(saved_ltp, ac->buf_mdct + 512, 448 * sizeof(*saved_ltp));
2742 4 memset(saved_ltp + 576, 0, 448 * sizeof(*saved_ltp));
2743 4 ac->fdsp->vector_fmul_reverse(saved_ltp + 448, ac->buf_mdct + 960, &swindow[64], 64);
2744
2745
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260 for (i = 0; i < 64; i++)
2746 256 saved_ltp[i + 512] = AAC_MUL31(ac->buf_mdct[1023 - i], swindow[63 - i]);
2747 } else { // LONG_STOP or ONLY_LONG
2748 3560 ac->fdsp->vector_fmul_reverse(saved_ltp, ac->buf_mdct + 512, &lwindow[512], 512);
2749
2750
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1826280 for (i = 0; i < 512; i++)
2751 1822720 saved_ltp[i + 512] = AAC_MUL31(ac->buf_mdct[1023 - i], lwindow[511 - i]);
2752 }
2753
2754 3568 memcpy(sce->ltp_state, sce->ltp_state+1024, 1024 * sizeof(*sce->ltp_state));
2755 3568 memcpy(sce->ltp_state+1024, sce->ret, 1024 * sizeof(*sce->ltp_state));
2756 3568 memcpy(sce->ltp_state+2048, saved_ltp, 1024 * sizeof(*sce->ltp_state));
2757 3568 }
2758
2759 /**
2760 * Conduct IMDCT and windowing.
2761 */
2762 62334 static void imdct_and_windowing(AACContext *ac, SingleChannelElement *sce)
2763 {
2764 62334 IndividualChannelStream *ics = &sce->ics;
2765 62334 INTFLOAT *in = sce->coeffs;
2766 62334 INTFLOAT *out = sce->ret;
2767 62334 INTFLOAT *saved = sce->saved;
2768
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62334 const INTFLOAT *swindow = ics->use_kb_window[0] ? AAC_RENAME2(aac_kbd_short_128) : AAC_RENAME2(sine_128);
2769
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62334 const INTFLOAT *lwindow_prev = ics->use_kb_window[1] ? AAC_RENAME2(aac_kbd_long_1024) : AAC_RENAME2(sine_1024);
2770
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62334 const INTFLOAT *swindow_prev = ics->use_kb_window[1] ? AAC_RENAME2(aac_kbd_short_128) : AAC_RENAME2(sine_128);
2771 62334 INTFLOAT *buf = ac->buf_mdct;
2772 62334 INTFLOAT *temp = ac->temp;
2773 int i;
2774
2775 // imdct
2776
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62334 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2777
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18792 for (i = 0; i < 1024; i += 128)
2778 16704 ac->mdct_small.imdct_half(&ac->mdct_small, buf + i, in + i);
2779 } else {
2780 60246 ac->mdct.imdct_half(&ac->mdct, buf, in);
2781 #if USE_FIXED
2782
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16967850 for (i=0; i<1024; i++)
2783 16951296 buf[i] = (buf[i] + 4LL) >> 3;
2784 #endif /* USE_FIXED */
2785 }
2786
2787 /* window overlapping
2788 * NOTE: To simplify the overlapping code, all 'meaningless' short to long
2789 * and long to short transitions are considered to be short to short
2790 * transitions. This leaves just two cases (long to long and short to short)
2791 * with a little special sauce for EIGHT_SHORT_SEQUENCE.
2792 */
2793
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62334 if ((ics->window_sequence[1] == ONLY_LONG_SEQUENCE || ics->window_sequence[1] == LONG_STOP_SEQUENCE) &&
2794
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59164 (ics->window_sequence[0] == ONLY_LONG_SEQUENCE || ics->window_sequence[0] == LONG_START_SEQUENCE)) {
2795 59162 ac->fdsp->vector_fmul_window( out, saved, buf, lwindow_prev, 512);
2796 } else {
2797 3172 memcpy( out, saved, 448 * sizeof(*out));
2798
2799
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3172 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2800 2088 ac->fdsp->vector_fmul_window(out + 448 + 0*128, saved + 448, buf + 0*128, swindow_prev, 64);
2801 2088 ac->fdsp->vector_fmul_window(out + 448 + 1*128, buf + 0*128 + 64, buf + 1*128, swindow, 64);
2802 2088 ac->fdsp->vector_fmul_window(out + 448 + 2*128, buf + 1*128 + 64, buf + 2*128, swindow, 64);
2803 2088 ac->fdsp->vector_fmul_window(out + 448 + 3*128, buf + 2*128 + 64, buf + 3*128, swindow, 64);
2804 2088 ac->fdsp->vector_fmul_window(temp, buf + 3*128 + 64, buf + 4*128, swindow, 64);
2805 2088 memcpy( out + 448 + 4*128, temp, 64 * sizeof(*out));
2806 } else {
2807 1084 ac->fdsp->vector_fmul_window(out + 448, saved + 448, buf, swindow_prev, 64);
2808 1084 memcpy( out + 576, buf + 64, 448 * sizeof(*out));
2809 }
2810 }
2811
2812 // buffer update
2813
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62334 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2814 2088 memcpy( saved, temp + 64, 64 * sizeof(*saved));
2815 2088 ac->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, swindow, 64);
2816 2088 ac->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, swindow, 64);
2817 2088 ac->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, swindow, 64);
2818 2088 memcpy( saved + 448, buf + 7*128 + 64, 64 * sizeof(*saved));
2819
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60246 } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
2820 1217 memcpy( saved, buf + 512, 448 * sizeof(*saved));
2821 1217 memcpy( saved + 448, buf + 7*128 + 64, 64 * sizeof(*saved));
2822 } else { // LONG_STOP or ONLY_LONG
2823 59029 memcpy( saved, buf + 512, 512 * sizeof(*saved));
2824 }
2825 62334 }
2826
2827 /**
2828 * Conduct IMDCT and windowing.
2829 */
2830 387 static void imdct_and_windowing_960(AACContext *ac, SingleChannelElement *sce)
2831 {
2832 #if !USE_FIXED
2833 387 IndividualChannelStream *ics = &sce->ics;
2834 387 INTFLOAT *in = sce->coeffs;
2835 387 INTFLOAT *out = sce->ret;
2836 387 INTFLOAT *saved = sce->saved;
2837
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387 const INTFLOAT *swindow = ics->use_kb_window[0] ? AAC_RENAME(aac_kbd_short_120) : AAC_RENAME(sine_120);
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387 const INTFLOAT *lwindow_prev = ics->use_kb_window[1] ? AAC_RENAME(aac_kbd_long_960) : AAC_RENAME(sine_960);
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387 const INTFLOAT *swindow_prev = ics->use_kb_window[1] ? AAC_RENAME(aac_kbd_short_120) : AAC_RENAME(sine_120);
2840 387 INTFLOAT *buf = ac->buf_mdct;
2841 387 INTFLOAT *temp = ac->temp;
2842 int i;
2843
2844 // imdct
2845
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387 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2846
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9 for (i = 0; i < 8; i++)
2847 8 ac->mdct120->imdct_half(ac->mdct120, buf + i * 120, in + i * 128, 1);
2848 } else {
2849 386 ac->mdct960->imdct_half(ac->mdct960, buf, in, 1);
2850 }
2851
2852 /* window overlapping
2853 * NOTE: To simplify the overlapping code, all 'meaningless' short to long
2854 * and long to short transitions are considered to be short to short
2855 * transitions. This leaves just two cases (long to long and short to short)
2856 * with a little special sauce for EIGHT_SHORT_SEQUENCE.
2857 */
2858
2859
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387 if ((ics->window_sequence[1] == ONLY_LONG_SEQUENCE || ics->window_sequence[1] == LONG_STOP_SEQUENCE) &&
2860
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385 (ics->window_sequence[0] == ONLY_LONG_SEQUENCE || ics->window_sequence[0] == LONG_START_SEQUENCE)) {
2861 385 ac->fdsp->vector_fmul_window( out, saved, buf, lwindow_prev, 480);
2862 } else {
2863 2 memcpy( out, saved, 420 * sizeof(*out));
2864
2865
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2 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2866 1 ac->fdsp->vector_fmul_window(out + 420 + 0*120, saved + 420, buf + 0*120, swindow_prev, 60);
2867 1 ac->fdsp->vector_fmul_window(out + 420 + 1*120, buf + 0*120 + 60, buf + 1*120, swindow, 60);
2868 1 ac->fdsp->vector_fmul_window(out + 420 + 2*120, buf + 1*120 + 60, buf + 2*120, swindow, 60);
2869 1 ac->fdsp->vector_fmul_window(out + 420 + 3*120, buf + 2*120 + 60, buf + 3*120, swindow, 60);
2870 1 ac->fdsp->vector_fmul_window(temp, buf + 3*120 + 60, buf + 4*120, swindow, 60);
2871 1 memcpy( out + 420 + 4*120, temp, 60 * sizeof(*out));
2872 } else {
2873 1 ac->fdsp->vector_fmul_window(out + 420, saved + 420, buf, swindow_prev, 60);
2874 1 memcpy( out + 540, buf + 60, 420 * sizeof(*out));
2875 }
2876 }
2877
2878 // buffer update
2879
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387 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
2880 1 memcpy( saved, temp + 60, 60 * sizeof(*saved));
2881 1 ac->fdsp->vector_fmul_window(saved + 60, buf + 4*120 + 60, buf + 5*120, swindow, 60);
2882 1 ac->fdsp->vector_fmul_window(saved + 180, buf + 5*120 + 60, buf + 6*120, swindow, 60);
2883 1 ac->fdsp->vector_fmul_window(saved + 300, buf + 6*120 + 60, buf + 7*120, swindow, 60);
2884 1 memcpy( saved + 420, buf + 7*120 + 60, 60 * sizeof(*saved));
2885
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386 } else if (ics->window_sequence[0] == LONG_START_SEQUENCE) {
2886 2 memcpy( saved, buf + 480, 420 * sizeof(*saved));
2887 2 memcpy( saved + 420, buf + 7*120 + 60, 60 * sizeof(*saved));
2888 } else { // LONG_STOP or ONLY_LONG
2889 384 memcpy( saved, buf + 480, 480 * sizeof(*saved));
2890 }
2891 #endif
2892 387 }
2893 3636 static void imdct_and_windowing_ld(AACContext *ac, SingleChannelElement *sce)
2894 {
2895 3636 IndividualChannelStream *ics = &sce->ics;
2896 3636 INTFLOAT *in = sce->coeffs;
2897 3636 INTFLOAT *out = sce->ret;
2898 3636 INTFLOAT *saved = sce->saved;
2899 3636 INTFLOAT *buf = ac->buf_mdct;
2900 #if USE_FIXED
2901 int i;
2902 #endif /* USE_FIXED */
2903
2904 // imdct
2905 3636 ac->mdct.imdct_half(&ac->mdct_ld, buf, in);
2906
2907 #if USE_FIXED
2908
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1857300 for (i = 0; i < 1024; i++)
2909 1855488 buf[i] = (buf[i] + 2) >> 2;
2910 #endif /* USE_FIXED */
2911
2912 // window overlapping
2913
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3636 if (ics->use_kb_window[1]) {
2914 // AAC LD uses a low overlap sine window instead of a KBD window
2915 62 memcpy(out, saved, 192 * sizeof(*out));
2916 62 ac->fdsp->vector_fmul_window(out + 192, saved + 192, buf, AAC_RENAME2(sine_128), 64);
2917 62 memcpy( out + 320, buf + 64, 192 * sizeof(*out));
2918 } else {
2919 3574 ac->fdsp->vector_fmul_window(out, saved, buf, AAC_RENAME2(sine_512), 256);
2920 }
2921
2922 // buffer update
2923 3636 memcpy(saved, buf + 256, 256 * sizeof(*saved));
2924 3636 }
2925
2926 26598 static void imdct_and_windowing_eld(AACContext *ac, SingleChannelElement *sce)
2927 {
2928 26598 UINTFLOAT *in = sce->coeffs;
2929 26598 INTFLOAT *out = sce->ret;
2930 26598 INTFLOAT *saved = sce->saved;
2931 26598 INTFLOAT *buf = ac->buf_mdct;
2932 int i;
2933
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26598 const int n = ac->oc[1].m4ac.frame_length_short ? 480 : 512;
2934 26598 const int n2 = n >> 1;
2935 26598 const int n4 = n >> 2;
2936
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26598 const INTFLOAT *const window = n == 480 ? AAC_RENAME(ff_aac_eld_window_480) :
2937 AAC_RENAME(ff_aac_eld_window_512);
2938
2939 // Inverse transform, mapped to the conventional IMDCT by
2940 // Chivukula, R.K.; Reznik, Y.A.; Devarajan, V.,
2941 // "Efficient algorithms for MPEG-4 AAC-ELD, AAC-LD and AAC-LC filterbanks,"
2942 // International Conference on Audio, Language and Image Processing, ICALIP 2008.
2943 // URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4590245&isnumber=4589950
2944
2/2
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3374198 for (i = 0; i < n2; i+=2) {
2945 INTFLOAT temp;
2946 3347600 temp = in[i ]; in[i ] = -in[n - 1 - i]; in[n - 1 - i] = temp;
2947 3347600 temp = -in[i + 1]; in[i + 1] = in[n - 2 - i]; in[n - 2 - i] = temp;
2948 }
2949 #if !USE_FIXED
2950
2/2
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✓ Branch 1 taken 9743 times.
16861 if (n == 480)
2951 7118 ac->mdct480->imdct_half(ac->mdct480, buf, in, 1);
2952 else
2953 #endif
2954 19480 ac->mdct.imdct_half(&ac->mdct_ld, buf, in);
2955
2956 #if USE_FIXED
2957
2/2
✓ Branch 0 taken 9970688 times.
✓ Branch 1 taken 9737 times.
9980425 for (i = 0; i < 1024; i++)
2958 9970688 buf[i] = (buf[i] + 1) >> 1;
2959 #endif /* USE_FIXED */
2960
2961
2/2
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✓ Branch 1 taken 26598 times.
6721798 for (i = 0; i < n; i+=2) {
2962 6695200 buf[i] = -buf[i];
2963 }
2964 // Like with the regular IMDCT at this point we still have the middle half
2965 // of a transform but with even symmetry on the left and odd symmetry on
2966 // the right
2967
2968 // window overlapping
2969 // The spec says to use samples [0..511] but the reference decoder uses
2970 // samples [128..639].
2971
2/2
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3374198 for (i = n4; i < n2; i ++) {
2972 3347600 out[i - n4] = AAC_MUL31( buf[ n2 - 1 - i] , window[i - n4]) +
2973 3347600 AAC_MUL31( saved[ i + n2] , window[i + n - n4]) +
2974 3347600 AAC_MUL31(-saved[n + n2 - 1 - i] , window[i + 2*n - n4]) +
2975 3347600 AAC_MUL31(-saved[ 2*n + n2 + i] , window[i + 3*n - n4]);
2976 }
2977
2/2
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6721798 for (i = 0; i < n2; i ++) {
2978 6695200 out[n4 + i] = AAC_MUL31( buf[ i] , window[i + n2 - n4]) +
2979 6695200 AAC_MUL31(-saved[ n - 1 - i] , window[i + n2 + n - n4]) +
2980 6695200 AAC_MUL31(-saved[ n + i] , window[i + n2 + 2*n - n4]) +
2981 6695200 AAC_MUL31( saved[2*n + n - 1 - i] , window[i + n2 + 3*n - n4]);
2982 }
2983
2/2
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3374198 for (i = 0; i < n4; i ++) {
2984 3347600 out[n2 + n4 + i] = AAC_MUL31( buf[ i + n2] , window[i + n - n4]) +
2985 3347600 AAC_MUL31(-saved[n2 - 1 - i] , window[i + 2*n - n4]) +
2986 3347600 AAC_MUL31(-saved[n + n2 + i] , window[i + 3*n - n4]);
2987 }
2988
2989 // buffer update
2990 26598 memmove(saved + n, saved, 2 * n * sizeof(*saved));
2991 26598 memcpy( saved, buf, n * sizeof(*saved));
2992 26598 }
2993
2994 /**
2995 * channel coupling transformation interface
2996 *
2997 * @param apply_coupling_method pointer to (in)dependent coupling function
2998 */
2999 176290 static void apply_channel_coupling(AACContext *ac, ChannelElement *cc,
3000 enum RawDataBlockType type, int elem_id,
3001 enum CouplingPoint coupling_point,
3002 void (*apply_coupling_method)(AACContext *ac, SingleChannelElement *target, ChannelElement *cce, int index))
3003 {
3004 int i, c;
3005
3006
2/2
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2996930 for (i = 0; i < MAX_ELEM_ID; i++) {
3007 2820640 ChannelElement *cce = ac->che[TYPE_CCE][i];
3008 2820640 int index = 0;
3009
3010
4/4
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✓ Branch 2 taken 3915 times.
✓ Branch 3 taken 7825 times.
2820640 if (cce && cce->coup.coupling_point == coupling_point) {
3011 3915 ChannelCoupling *coup = &cce->coup;
3012
3013
2/2
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✓ Branch 1 taken 3915 times.
13317 for (c = 0; c <= coup->num_coupled; c++) {
3014
4/4
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✓ Branch 1 taken 4313 times.
✓ Branch 2 taken 2741 times.
✓ Branch 3 taken 2348 times.
9402 if (coup->type[c] == type && coup->id_select[c] == elem_id) {
3015
2/2
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✓ Branch 1 taken 180 times.
2741 if (coup->ch_select[c] != 1) {
3016 2561 apply_coupling_method(ac, &cc->ch[0], cce, index);
3017
1/2
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✗ Branch 1 not taken.
2561 if (coup->ch_select[c] != 0)
3018 2561 index++;
3019 }
3020
2/2
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✓ Branch 1 taken 594 times.
2741 if (coup->ch_select[c] != 2)
3021 2147 apply_coupling_method(ac, &cc->ch[1], cce, index++);
3022 } else
3023
2/2
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✓ Branch 1 taken 1941 times.
6661 index += 1 + (coup->ch_select[c] == 3);
3024 }
3025 }
3026 }
3027 176290 }
3028
3029 /**
3030 * Convert spectral data to samples, applying all supported tools as appropriate.
3031 */
3032 50004 static void spectral_to_sample(AACContext *ac, int samples)
3033 {
3034 int i, type;
3035 void (*imdct_and_window)(AACContext *ac, SingleChannelElement *sce);
3036
3/3
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✓ Branch 1 taken 16365 times.
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50004 switch (ac->oc[1].m4ac.object_type) {
3037 606 case AOT_ER_AAC_LD:
3038 606 imdct_and_window = imdct_and_windowing_ld;
3039 606 break;
3040 16365 case AOT_ER_AAC_ELD:
3041 16365 imdct_and_window = imdct_and_windowing_eld;
3042 16365 break;
3043 33033 default:
3044
2/2
✓ Branch 0 taken 387 times.
✓ Branch 1 taken 32646 times.
33033 if (ac->oc[1].m4ac.frame_length_short)
3045 387 imdct_and_window = imdct_and_windowing_960;
3046 else
3047 32646 imdct_and_window = ac->imdct_and_windowing;
3048 }
3049
2/2
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✓ Branch 1 taken 50004 times.
250020 for (type = 3; type >= 0; type--) {
3050
2/2
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✓ Branch 1 taken 200016 times.
3400272 for (i = 0; i < MAX_ELEM_ID; i++) {
3051 3200256 ChannelElement *che = ac->che[type][i];
3052
4/4
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✓ Branch 1 taken 3136877 times.
✓ Branch 2 taken 63050 times.
✓ Branch 3 taken 329 times.
3200256 if (che && che->present) {
3053
2/2
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✓ Branch 1 taken 4678 times.
63050 if (type <= TYPE_CPE)
3054 58372 apply_channel_coupling(ac, che, type, i, BEFORE_TNS, AAC_RENAME(apply_dependent_coupling));
3055
2/2
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✓ Branch 1 taken 61266 times.
63050 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP) {
3056
2/2
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✓ Branch 1 taken 1246 times.
1784 if (che->ch[0].ics.predictor_present) {
3057
2/2
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✓ Branch 1 taken 156 times.
538 if (che->ch[0].ics.ltp.present)
3058 382 ac->apply_ltp(ac, &che->ch[0]);
3059
3/4
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✓ Branch 2 taken 404 times.
✗ Branch 3 not taken.
538 if (che->ch[1].ics.ltp.present && type == TYPE_CPE)
3060 404 ac->apply_ltp(ac, &che->ch[1]);
3061 }
3062 }
3063
2/2
✓ Branch 0 taken 4633 times.
✓ Branch 1 taken 58417 times.
63050 if (che->ch[0].tns.present)
3064 4633 ac->apply_tns(che->ch[0].coeffs, &che->ch[0].tns, &che->ch[0].ics, 1);
3065
2/2
✓ Branch 0 taken 2294 times.
✓ Branch 1 taken 60756 times.
63050 if (che->ch[1].tns.present)
3066 2294 ac->apply_tns(che->ch[1].coeffs, &che->ch[1].tns, &che->ch[1].ics, 1);
3067
2/2
✓ Branch 0 taken 58372 times.
✓ Branch 1 taken 4678 times.
63050 if (type <= TYPE_CPE)
3068 58372 apply_channel_coupling(ac, che, type, i, BETWEEN_TNS_AND_IMDCT, AAC_RENAME(apply_dependent_coupling));
3069
4/4
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✓ Branch 1 taken 61876 times.
✓ Branch 2 taken 393 times.
✓ Branch 3 taken 781 times.
63050 if (type != TYPE_CCE || che->coup.coupling_point == AFTER_IMDCT) {
3070 62269 imdct_and_window(ac, &che->ch[0]);
3071
2/2
✓ Branch 0 taken 1784 times.
✓ Branch 1 taken 60485 times.
62269 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
3072 1784 ac->update_ltp(ac, &che->ch[0]);
3073
2/2
✓ Branch 0 taken 30686 times.
✓ Branch 1 taken 31583 times.
62269 if (type == TYPE_CPE) {
3074 30686 imdct_and_window(ac, &che->ch[1]);
3075
2/2
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✓ Branch 1 taken 28902 times.
30686 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
3076 1784 ac->update_ltp(ac, &che->ch[1]);
3077 }
3078
2/2
✓ Branch 0 taken 12411 times.
✓ Branch 1 taken 49858 times.
62269 if (ac->oc[1].m4ac.sbr > 0) {
3079 12411 AAC_RENAME(ff_sbr_apply)(ac, &che->sbr, type, che->ch[0].ret, che->ch[1].ret);
3080 }
3081 }
3082
2/2
✓ Branch 0 taken 59546 times.
✓ Branch 1 taken 3504 times.
63050 if (type <= TYPE_CCE)
3083 59546 apply_channel_coupling(ac, che, type, i, AFTER_IMDCT, AAC_RENAME(apply_independent_coupling));
3084
3085 #if USE_FIXED
3086 {
3087 int j;
3088 /* preparation for resampler */
3089
2/2
✓ Branch 0 taken 19882496 times.
✓ Branch 1 taken 19451 times.
19901947 for(j = 0; j<samples; j++){
3090 19882496 che->ch[0].ret[j] = (int32_t)av_clip64((int64_t)che->ch[0].ret[j]*128, INT32_MIN, INT32_MAX-0x8000)+0x8000;
3091
2/2
✓ Branch 0 taken 9935872 times.
✓ Branch 1 taken 9946624 times.
19882496 if(type == TYPE_CPE)
3092 9935872 che->ch[1].ret[j] = (int32_t)av_clip64((int64_t)che->ch[1].ret[j]*128, INT32_MIN, INT32_MAX-0x8000)+0x8000;
3093 }
3094 }
3095 #endif /* USE_FIXED */
3096 63050 che->present = 0;
3097
2/2
✓ Branch 0 taken 329 times.
✓ Branch 1 taken 3136877 times.
3137206 } else if (che) {
3098 329 av_log(ac->avctx, AV_LOG_VERBOSE, "ChannelElement %d.%d missing \n", type, i);
3099 }
3100 }
3101 }
3102 50004 }
3103
3104 4112 static int parse_adts_frame_header(AACContext *ac, GetBitContext *gb)
3105 {
3106 int size;
3107 AACADTSHeaderInfo hdr_info;
3108 uint8_t layout_map[MAX_ELEM_ID*4][3];
3109 int layout_map_tags, ret;
3110
3111 4112 size = ff_adts_header_parse(gb, &hdr_info);
3112
1/2
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4112 if (size > 0) {
3113
2/4
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✓ Branch 3 taken 4112 times.
4112 if (!ac->warned_num_aac_frames && hdr_info.num_aac_frames != 1) {
3114 // This is 2 for "VLB " audio in NSV files.
3115 // See samples/nsv/vlb_audio.
3116 avpriv_report_missing_feature(ac->avctx,
3117 "More than one AAC RDB per ADTS frame");
3118 ac->warned_num_aac_frames = 1;
3119 }
3120 4112 push_output_configuration(ac);
3121
1/2
✓ Branch 0 taken 4112 times.
✗ Branch 1 not taken.
4112 if (hdr_info.chan_config) {
3122 4112 ac->oc[1].m4ac.chan_config = hdr_info.chan_config;
3123
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4112 times.
4112 if ((ret = set_default_channel_config(ac, ac->avctx,
3124 layout_map,
3125 &layout_map_tags,
3126 4112 hdr_info.chan_config)) < 0)
3127 return ret;
3128
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4112 times.
4112 if ((ret = output_configure(ac, layout_map, layout_map_tags,
3129 4112 FFMAX(ac->oc[1].status,
3130 OC_TRIAL_FRAME), 0)) < 0)
3131 return ret;
3132 } else {
3133 ac->oc[1].m4ac.chan_config = 0;
3134 /**
3135 * dual mono frames in Japanese DTV can have chan_config 0
3136 * WITHOUT specifying PCE.
3137 * thus, set dual mono as default.
3138 */
3139 if (ac->dmono_mode && ac->oc[0].status == OC_NONE) {
3140 layout_map_tags = 2;
3141 layout_map[0][0] = layout_map[1][0] = TYPE_SCE;
3142 layout_map[0][2] = layout_map[1][2] = AAC_CHANNEL_FRONT;
3143 layout_map[0][1] = 0;
3144 layout_map[1][1] = 1;
3145 if (output_configure(ac, layout_map, layout_map_tags,
3146 OC_TRIAL_FRAME, 0))
3147 return -7;
3148 }
3149 }
3150 4112 ac->oc[1].m4ac.sample_rate = hdr_info.sample_rate;
3151 4112 ac->oc[1].m4ac.sampling_index = hdr_info.sampling_index;
3152 4112 ac->oc[1].m4ac.object_type = hdr_info.object_type;
3153 4112 ac->oc[1].m4ac.frame_length_short = 0;
3154
2/2
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✓ Branch 1 taken 54 times.
4112 if (ac->oc[0].status != OC_LOCKED ||
3155
1/2
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✗ Branch 1 not taken.
4058 ac->oc[0].m4ac.chan_config != hdr_info.chan_config ||
3156
1/2
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✓ Branch 1 taken 4058 times.
4058 ac->oc[0].m4ac.sample_rate != hdr_info.sample_rate) {
3157 54 ac->oc[1].m4ac.sbr = -1;
3158 54 ac->oc[1].m4ac.ps = -1;
3159 }
3160
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 4111 times.
4112 if (!hdr_info.crc_absent)
3161 1 skip_bits(gb, 16);
3162 }
3163 4112 return size;
3164 }
3165
3166 16971 static int aac_decode_er_frame(AVCodecContext *avctx, void *data,
3167 int *got_frame_ptr, GetBitContext *gb)
3168 {
3169 16971 AACContext *ac = avctx->priv_data;
3170 16971 const MPEG4AudioConfig *const m4ac = &ac->oc[1].m4ac;
3171 ChannelElement *che;
3172 int err, i;
3173
2/2
✓ Branch 0 taken 3559 times.
✓ Branch 1 taken 13412 times.
16971 int samples = m4ac->frame_length_short ? 960 : 1024;
3174 16971 int chan_config = m4ac->chan_config;
3175 16971 int aot = m4ac->object_type;
3176
3177
3/4
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✓ Branch 1 taken 606 times.
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✗ Branch 3 not taken.
16971 if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD)
3178 16971 samples >>= 1;
3179
3180 16971 ac->frame = data;
3181
3182
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 16971 times.
16971 if ((err = frame_configure_elements(avctx)) < 0)
3183 return err;
3184
3185 // The FF_PROFILE_AAC_* defines are all object_type - 1
3186 // This may lead to an undefined profile being signaled
3187 16971 ac->avctx->profile = aot - 1;
3188
3189 16971 ac->tags_mapped = 0;
3190
3191
3/8
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16971 if (chan_config < 0 || (chan_config >= 8 && chan_config < 11) || chan_config >= 13) {
3192 avpriv_request_sample(avctx, "Unknown ER channel configuration %d",
3193 chan_config);
3194 return AVERROR_INVALIDDATA;
3195 }
3196
2/2
✓ Branch 0 taken 18789 times.
✓ Branch 1 taken 16971 times.
35760 for (i = 0; i < tags_per_config[chan_config]; i++) {
3197 18789 const int elem_type = aac_channel_layout_map[chan_config-1][i][0];
3198 18789 const int elem_id = aac_channel_layout_map[chan_config-1][i][1];
3199
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 18789 times.
18789 if (!(che=get_che(ac, elem_type, elem_id))) {
3200 av_log(ac->avctx, AV_LOG_ERROR,
3201 "channel element %d.%d is not allocated\n",
3202 elem_type, elem_id);
3203 return AVERROR_INVALIDDATA;
3204 }
3205 18789 che->present = 1;
3206
2/2
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✓ Branch 1 taken 16365 times.
18789 if (aot != AOT_ER_AAC_ELD)
3207 2424 skip_bits(gb, 4);
3208
3/4
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✓ Branch 1 taken 11445 times.
✓ Branch 2 taken 606 times.
✗ Branch 3 not taken.
18789 switch (elem_type) {
3209 6738 case TYPE_SCE:
3210 6738 err = decode_ics(ac, &che->ch[0], gb, 0, 0);
3211 6738 break;
3212 11445 case TYPE_CPE:
3213 11445 err = decode_cpe(ac, gb, che);
3214 11445 break;
3215 606 case TYPE_LFE:
3216 606 err = decode_ics(ac, &che->ch[0], gb, 0, 0);
3217 606 break;
3218 }
3219
1/2
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✓ Branch 1 taken 18789 times.
18789 if (err < 0)
3220 return err;
3221 }
3222
3223 16971 spectral_to_sample(ac, samples);
3224
3225
1/4
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✓ Branch 1 taken 16971 times.
✗ Branch 2 not taken.
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16971 if (!ac->frame->data[0] && samples) {
3226 av_log(avctx, AV_LOG_ERROR, "no frame data found\n");
3227 return AVERROR_INVALIDDATA;
3228 }
3229
3230 16971 ac->frame->nb_samples = samples;
3231 16971 ac->frame->sample_rate = avctx->sample_rate;
3232 16971 *got_frame_ptr = 1;
3233
3234 16971 skip_bits_long(gb, get_bits_left(gb));
3235 16971 return 0;
3236 }
3237
3238 33033 static int aac_decode_frame_int(AVCodecContext *avctx, AVFrame *frame,
3239 int *got_frame_ptr, GetBitContext *gb,
3240 const AVPacket *avpkt)
3241 {
3242 33033 AACContext *ac = avctx->priv_data;
3243 33033 ChannelElement *che = NULL, *che_prev = NULL;
3244 33033 enum RawDataBlockType elem_type, che_prev_type = TYPE_END;
3245 int err, elem_id;
3246 33033 int samples = 0, multiplier, audio_found = 0, pce_found = 0;
3247 33033 int is_dmono, sce_count = 0;
3248 int payload_alignment;
3249 33033 uint8_t che_presence[4][MAX_ELEM_ID] = {{0}};
3250
3251 33033 ac->frame = frame;
3252
3253
2/2
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✓ Branch 2 taken 28921 times.
33033 if (show_bits(gb, 12) == 0xfff) {
3254
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 4112 times.
4112 if ((err = parse_adts_frame_header(ac, gb)) < 0) {
3255 av_log(avctx, AV_LOG_ERROR, "Error decoding AAC frame header.\n");
3256 goto fail;
3257 }
3258
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4112 times.
4112 if (ac->oc[1].m4ac.sampling_index > 12) {
3259 av_log(ac->avctx, AV_LOG_ERROR, "invalid sampling rate index %d\n", ac->oc[1].m4ac.sampling_index);
3260 err = AVERROR_INVALIDDATA;
3261 goto fail;
3262 }
3263 }
3264
3265
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 33033 times.
33033 if ((err = frame_configure_elements(avctx)) < 0)
3266 goto fail;
3267
3268 // The FF_PROFILE_AAC_* defines are all object_type - 1
3269 // This may lead to an undefined profile being signaled
3270 33033 ac->avctx->profile = ac->oc[1].m4ac.object_type - 1;
3271
3272 33033 payload_alignment = get_bits_count(gb);
3273 33033 ac->tags_mapped = 0;
3274 // parse
3275
2/2
✓ Branch 1 taken 72301 times.
✓ Branch 2 taken 33033 times.
105334 while ((elem_type = get_bits(gb, 3)) != TYPE_END) {
3276 72301 elem_id = get_bits(gb, 4);
3277
3278
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 72301 times.
72301 if (avctx->debug & FF_DEBUG_STARTCODE)
3279 av_log(avctx, AV_LOG_DEBUG, "Elem type:%x id:%x\n", elem_type, elem_id);
3280
3281
1/4
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✗ Branch 2 not taken.
✗ Branch 3 not taken.
72301 if (!avctx->ch_layout.nb_channels && elem_type != TYPE_PCE) {
3282 err = AVERROR_INVALIDDATA;
3283 goto fail;
3284 }
3285
3286
2/2
✓ Branch 0 taken 44261 times.
✓ Branch 1 taken 28040 times.
72301 if (elem_type < TYPE_DSE) {
3287
1/2
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✓ Branch 1 taken 44261 times.
44261 if (che_presence[elem_type][elem_id]) {
3288 int error = che_presence[elem_type][elem_id] > 1;
3289 av_log(ac->avctx, error ? AV_LOG_ERROR : AV_LOG_DEBUG, "channel element %d.%d duplicate\n",
3290 elem_type, elem_id);
3291 if (error) {
3292 err = AVERROR_INVALIDDATA;
3293 goto fail;
3294 }
3295 }
3296 44261 che_presence[elem_type][elem_id]++;
3297
3298
1/2
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44261 if (!(che=get_che(ac, elem_type, elem_id))) {
3299 av_log(ac->avctx, AV_LOG_ERROR, "channel element %d.%d is not allocated\n",
3300 elem_type, elem_id);
3301 err = AVERROR_INVALIDDATA;
3302 goto fail;
3303 }
3304
2/2
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44261 samples = ac->oc[1].m4ac.frame_length_short ? 960 : 1024;
3305 44261 che->present = 1;
3306 }
3307
3308
6/8
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72301 switch (elem_type) {
3309
3310 20948 case TYPE_SCE:
3311 20948 err = decode_ics(ac, &che->ch[0], gb, 0, 0);
3312 20948 audio_found = 1;
3313 20948 sce_count++;
3314 20948 break;
3315
3316 19241 case TYPE_CPE:
3317 19241 err = decode_cpe(ac, gb, che);
3318 19241